CINXE.COM

<!DOCTYPE html> <html class="client-nojs vector-feature-language-in-header-enabled vector-feature-language-in-main-page-header-disabled vector-feature-sticky-header-disabled vector-feature-page-tools-pinned-disabled vector-feature-toc-pinned-clientpref-1 vector-feature-main-menu-pinned-disabled vector-feature-limited-width-clientpref-1 vector-feature-limited-width-content-enabled vector-feature-custom-font-size-clientpref-1 vector-feature-appearance-pinned-clientpref-1 vector-feature-night-mode-enabled skin-theme-clientpref-day vector-toc-available" lang="en" dir="ltr"> <head> <meta charset="UTF-8"> <title>2+1 road - Wikipedia</title> <script>(function(){var className="client-js vector-feature-language-in-header-enabled vector-feature-language-in-main-page-header-disabled vector-feature-sticky-header-disabled vector-feature-page-tools-pinned-disabled vector-feature-toc-pinned-clientpref-1 vector-feature-main-menu-pinned-disabled vector-feature-limited-width-clientpref-1 vector-feature-limited-width-content-enabled vector-feature-custom-font-size-clientpref-1 vector-feature-appearance-pinned-clientpref-1 vector-feature-night-mode-enabled skin-theme-clientpref-day vector-toc-available";var cookie=document.cookie.match(/(?:^|; )enwikimwclientpreferences=([^;]+)/);if(cookie){cookie[1].split('%2C').forEach(function(pref){className=className.replace(new RegExp('(^| )'+pref.replace(/-clientpref-\w+$|[^\w-]+/g,'')+'-clientpref-\\w+( |$)'),'$1'+pref+'$2');});}document.documentElement.className=className;}());RLCONF={"wgBreakFrames":false,"wgSeparatorTransformTable":["",""],"wgDigitTransformTable":["",""],"wgDefaultDateFormat":"dmy", "wgMonthNames":["","January","February","March","April","May","June","July","August","September","October","November","December"],"wgRequestId":"117eac9d-22a9-49e8-9384-4e6fe7c5d1aa","wgCanonicalNamespace":"","wgCanonicalSpecialPageName":false,"wgNamespaceNumber":0,"wgPageName":"2+1_road","wgTitle":"2+1 road","wgCurRevisionId":1256504257,"wgRevisionId":1256504257,"wgArticleId":3649713,"wgIsArticle":true,"wgIsRedirect":false,"wgAction":"view","wgUserName":null,"wgUserGroups":["*"],"wgCategories":["CS1 Estonian-language sources (et)","Webarchive template wayback links","All articles with dead external links","Articles with dead external links from September 2024","Articles with permanently dead external links","Articles with dead external links from August 2019","Articles with dead external links from June 2022","Articles with short description","Short description matches Wikidata","Articles needing additional references from January 2011","All articles needing additional references", "All articles with unsourced statements","Articles with unsourced statements from April 2019","Commons category link from Wikidata","Articles containing video clips","Road surface markings","Types of roads"],"wgPageViewLanguage":"en","wgPageContentLanguage":"en","wgPageContentModel":"wikitext","wgRelevantPageName":"2+1_road","wgRelevantArticleId":3649713,"wgIsProbablyEditable":true,"wgRelevantPageIsProbablyEditable":true,"wgRestrictionEdit":[],"wgRestrictionMove":[],"wgNoticeProject":"wikipedia","wgCiteReferencePreviewsActive":false,"wgFlaggedRevsParams":{"tags":{"status":{"levels":1}}},"wgMediaViewerOnClick":true,"wgMediaViewerEnabledByDefault":true,"wgPopupsFlags":0,"wgVisualEditor":{"pageLanguageCode":"en","pageLanguageDir":"ltr","pageVariantFallbacks":"en"},"wgMFDisplayWikibaseDescriptions":{"search":true,"watchlist":true,"tagline":false,"nearby":true},"wgWMESchemaEditAttemptStepOversample":false,"wgWMEPageLength":20000,"wgRelatedArticlesCompat":[],"wgCentralAuthMobileDomain":false ,"wgEditSubmitButtonLabelPublish":true,"wgULSPosition":"interlanguage","wgULSisCompactLinksEnabled":false,"wgVector2022LanguageInHeader":true,"wgULSisLanguageSelectorEmpty":false,"wgWikibaseItemId":"Q3048788","wgCheckUserClientHintsHeadersJsApi":["brands","architecture","bitness","fullVersionList","mobile","model","platform","platformVersion"],"GEHomepageSuggestedEditsEnableTopics":true,"wgGETopicsMatchModeEnabled":false,"wgGEStructuredTaskRejectionReasonTextInputEnabled":false,"wgGELevelingUpEnabledForUser":false};RLSTATE={"ext.globalCssJs.user.styles":"ready","site.styles":"ready","user.styles":"ready","ext.globalCssJs.user":"ready","user":"ready","user.options":"loading","ext.cite.styles":"ready","ext.tmh.player.styles":"ready","skins.vector.search.codex.styles":"ready","skins.vector.styles":"ready","skins.vector.icons":"ready","jquery.makeCollapsible.styles":"ready","ext.wikimediamessages.styles":"ready","ext.visualEditor.desktopArticleTarget.noscript":"ready", "ext.uls.interlanguage":"ready","wikibase.client.init":"ready","ext.wikimediaBadges":"ready"};RLPAGEMODULES=["ext.cite.ux-enhancements","mediawiki.page.media","ext.tmh.player","site","mediawiki.page.ready","jquery.makeCollapsible","mediawiki.toc","skins.vector.js","ext.centralNotice.geoIP","ext.centralNotice.startUp","ext.gadget.ReferenceTooltips","ext.gadget.switcher","ext.urlShortener.toolbar","ext.centralauth.centralautologin","mmv.bootstrap","ext.popups","ext.visualEditor.desktopArticleTarget.init","ext.visualEditor.targetLoader","ext.echo.centralauth","ext.eventLogging","ext.wikimediaEvents","ext.navigationTiming","ext.uls.interface","ext.cx.eventlogging.campaigns","ext.cx.uls.quick.actions","wikibase.client.vector-2022","ext.checkUser.clientHints","ext.growthExperiments.SuggestedEditSession","wikibase.sidebar.tracking"];</script> <script>(RLQ=window.RLQ||[]).push(function(){mw.loader.impl(function(){return["user.options@12s5i",function($,jQuery,require,module){mw.user.tokens.set({"patrolToken":"+\\","watchToken":"+\\","csrfToken":"+\\"}); }];});});</script> <link rel="stylesheet" href="/w/load.php?lang=en&modules=ext.cite.styles%7Cext.tmh.player.styles%7Cext.uls.interlanguage%7Cext.visualEditor.desktopArticleTarget.noscript%7Cext.wikimediaBadges%7Cext.wikimediamessages.styles%7Cjquery.makeCollapsible.styles%7Cskins.vector.icons%2Cstyles%7Cskins.vector.search.codex.styles%7Cwikibase.client.init&only=styles&skin=vector-2022"> <script async="" src="/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022"></script> <meta name="ResourceLoaderDynamicStyles" content=""> <link rel="stylesheet" href="/w/load.php?lang=en&modules=site.styles&only=styles&skin=vector-2022"> <meta name="generator" content="MediaWiki 1.44.0-wmf.4"> <meta name="referrer" content="origin"> <meta name="referrer" content="origin-when-cross-origin"> <meta name="robots" content="max-image-preview:standard"> <meta name="format-detection" content="telephone=no"> <meta property="og:image" content="https://upload.wikimedia.org/wikipedia/commons/thumb/1/1d/MMLNorr1.JPG/1200px-MMLNorr1.JPG"> <meta property="og:image:width" content="1200"> <meta property="og:image:height" content="900"> <meta property="og:image" content="https://upload.wikimedia.org/wikipedia/commons/thumb/1/1d/MMLNorr1.JPG/800px-MMLNorr1.JPG"> <meta property="og:image:width" content="800"> <meta property="og:image:height" content="600"> <meta property="og:image" content="https://upload.wikimedia.org/wikipedia/commons/thumb/1/1d/MMLNorr1.JPG/640px-MMLNorr1.JPG"> <meta property="og:image:width" content="640"> <meta property="og:image:height" content="480"> <meta name="viewport" content="width=1120"> <meta property="og:title" content="2+1 road - Wikipedia"> <meta property="og:type" content="website"> <link rel="preconnect" href="//upload.wikimedia.org"> <link rel="alternate" media="only screen and (max-width: 640px)" href="//en.m.wikipedia.org/wiki/2%2B1_road"> <link rel="alternate" type="application/x-wiki" title="Edit this page" href="/w/index.php?title=2%2B1_road&action=edit"> <link rel="apple-touch-icon" href="/static/apple-touch/wikipedia.png"> <link rel="icon" href="/static/favicon/wikipedia.ico"> <link rel="search" type="application/opensearchdescription+xml" href="/w/rest.php/v1/search" title="Wikipedia (en)"> <link rel="EditURI" type="application/rsd+xml" href="//en.wikipedia.org/w/api.php?action=rsd"> <link rel="canonical" href="https://en.wikipedia.org/wiki/2%2B1_road"> <link rel="license" href="https://creativecommons.org/licenses/by-sa/4.0/deed.en"> <link rel="alternate" type="application/atom+xml" title="Wikipedia Atom feed" href="/w/index.php?title=Special:RecentChanges&feed=atom"> <link rel="dns-prefetch" href="//meta.wikimedia.org" /> <link rel="dns-prefetch" href="//login.wikimedia.org"> </head> <body class="skin--responsive skin-vector skin-vector-search-vue mediawiki ltr sitedir-ltr mw-hide-empty-elt ns-0 ns-subject mw-editable page-2_1_road rootpage-2_1_road skin-vector-2022 action-view"><a class="mw-jump-link" href="#bodyContent">Jump to content</a> <div class="vector-header-container"> <header class="vector-header mw-header"> <div class="vector-header-start"> <nav class="vector-main-menu-landmark" aria-label="Site"> <div id="vector-main-menu-dropdown" class="vector-dropdown vector-main-menu-dropdown vector-button-flush-left vector-button-flush-right" > <input type="checkbox" id="vector-main-menu-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-main-menu-dropdown" class="vector-dropdown-checkbox " aria-label="Main menu" > <label id="vector-main-menu-dropdown-label" for="vector-main-menu-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-menu mw-ui-icon-wikimedia-menu"></span> <span class="vector-dropdown-label-text">Main menu</span> </label> <div class="vector-dropdown-content"> <div id="vector-main-menu-unpinned-container" class="vector-unpinned-container"> <div id="vector-main-menu" class="vector-main-menu vector-pinnable-element"> <div class="vector-pinnable-header vector-main-menu-pinnable-header vector-pinnable-header-unpinned" data-feature-name="main-menu-pinned" data-pinnable-element-id="vector-main-menu" data-pinned-container-id="vector-main-menu-pinned-container" data-unpinned-container-id="vector-main-menu-unpinned-container" > <div class="vector-pinnable-header-label">Main menu</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-main-menu.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-main-menu.unpin">hide</button> </div> <div id="p-navigation" class="vector-menu mw-portlet mw-portlet-navigation" > <div class="vector-menu-heading"> Navigation </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-mainpage-description" class="mw-list-item"><a href="/wiki/Main_Page" title="Visit the main page [z]" accesskey="z"><span>Main page</span></a></li><li id="n-contents" class="mw-list-item"><a href="/wiki/Wikipedia:Contents" title="Guides to browsing Wikipedia"><span>Contents</span></a></li><li id="n-currentevents" class="mw-list-item"><a href="/wiki/Portal:Current_events" title="Articles related to current events"><span>Current events</span></a></li><li id="n-randompage" class="mw-list-item"><a href="/wiki/Special:Random" title="Visit a randomly selected article [x]" accesskey="x"><span>Random article</span></a></li><li id="n-aboutsite" class="mw-list-item"><a href="/wiki/Wikipedia:About" title="Learn about Wikipedia and how it works"><span>About Wikipedia</span></a></li><li id="n-contactpage" class="mw-list-item"><a href="//en.wikipedia.org/wiki/Wikipedia:Contact_us" title="How to contact Wikipedia"><span>Contact us</span></a></li> </ul> </div> </div> <div id="p-interaction" class="vector-menu mw-portlet mw-portlet-interaction" > <div class="vector-menu-heading"> Contribute </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-help" class="mw-list-item"><a href="/wiki/Help:Contents" title="Guidance on how to use and edit Wikipedia"><span>Help</span></a></li><li id="n-introduction" class="mw-list-item"><a href="/wiki/Help:Introduction" title="Learn how to edit Wikipedia"><span>Learn to edit</span></a></li><li id="n-portal" class="mw-list-item"><a href="/wiki/Wikipedia:Community_portal" title="The hub for editors"><span>Community portal</span></a></li><li id="n-recentchanges" class="mw-list-item"><a href="/wiki/Special:RecentChanges" title="A list of recent changes to Wikipedia [r]" accesskey="r"><span>Recent changes</span></a></li><li id="n-upload" class="mw-list-item"><a href="/wiki/Wikipedia:File_upload_wizard" title="Add images or other media for use on Wikipedia"><span>Upload file</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> <a href="/wiki/Main_Page" class="mw-logo"> <img class="mw-logo-icon" src="/static/images/icons/wikipedia.png" alt="" aria-hidden="true" height="50" width="50"> <span class="mw-logo-container skin-invert"> <img class="mw-logo-wordmark" alt="Wikipedia" src="/static/images/mobile/copyright/wikipedia-wordmark-en.svg" style="width: 7.5em; height: 1.125em;"> <img class="mw-logo-tagline" alt="The Free Encyclopedia" src="/static/images/mobile/copyright/wikipedia-tagline-en.svg" width="117" height="13" style="width: 7.3125em; height: 0.8125em;"> </span> </a> </div> <div class="vector-header-end"> <div id="p-search" role="search" class="vector-search-box-vue vector-search-box-collapses vector-search-box-show-thumbnail vector-search-box-auto-expand-width vector-search-box"> <a href="/wiki/Special:Search" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only search-toggle" title="Search Wikipedia [f]" accesskey="f"><span class="vector-icon mw-ui-icon-search mw-ui-icon-wikimedia-search"></span> <span>Search</span> </a> <div class="vector-typeahead-search-container"> <div class="cdx-typeahead-search cdx-typeahead-search--show-thumbnail cdx-typeahead-search--auto-expand-width"> <form action="/w/index.php" id="searchform" class="cdx-search-input cdx-search-input--has-end-button"> <div id="simpleSearch" class="cdx-search-input__input-wrapper" data-search-loc="header-moved"> <div class="cdx-text-input cdx-text-input--has-start-icon"> <input class="cdx-text-input__input" type="search" name="search" placeholder="Search Wikipedia" aria-label="Search Wikipedia" autocapitalize="sentences" title="Search Wikipedia [f]" accesskey="f" id="searchInput" > <span class="cdx-text-input__icon cdx-text-input__start-icon"></span> </div> <input type="hidden" name="title" value="Special:Search"> </div> <button class="cdx-button cdx-search-input__end-button">Search</button> </form> </div> </div> </div> <nav class="vector-user-links vector-user-links-wide" aria-label="Personal tools"> <div class="vector-user-links-main"> <div id="p-vector-user-menu-preferences" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-userpage" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <nav class="vector-appearance-landmark" aria-label="Appearance"> <div id="vector-appearance-dropdown" class="vector-dropdown " title="Change the appearance of the page's font size, width, and color" > <input type="checkbox" id="vector-appearance-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-appearance-dropdown" class="vector-dropdown-checkbox " aria-label="Appearance" > <label id="vector-appearance-dropdown-label" for="vector-appearance-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-appearance mw-ui-icon-wikimedia-appearance"></span> <span class="vector-dropdown-label-text">Appearance</span> </label> <div class="vector-dropdown-content"> <div id="vector-appearance-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <div id="p-vector-user-menu-notifications" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-overflow" class="vector-menu mw-portlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="https://donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_en.wikipedia.org&uselang=en" class=""><span>Donate</span></a> </li> <li id="pt-createaccount-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Special:CreateAccount&returnto=2%2B1+road" title="You are encouraged to create an account and log in; however, it is not mandatory" class=""><span>Create account</span></a> </li> <li id="pt-login-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Special:UserLogin&returnto=2%2B1+road" title="You're encouraged to log in; however, it's not mandatory. [o]" accesskey="o" class=""><span>Log in</span></a> </li> </ul> </div> </div> </div> <div id="vector-user-links-dropdown" class="vector-dropdown vector-user-menu vector-button-flush-right vector-user-menu-logged-out" title="Log in and more options" > <input type="checkbox" id="vector-user-links-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-user-links-dropdown" class="vector-dropdown-checkbox " aria-label="Personal tools" > <label id="vector-user-links-dropdown-label" for="vector-user-links-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-ellipsis mw-ui-icon-wikimedia-ellipsis"></span> <span class="vector-dropdown-label-text">Personal tools</span> </label> <div class="vector-dropdown-content"> <div id="p-personal" class="vector-menu mw-portlet mw-portlet-personal user-links-collapsible-item" title="User menu" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport" class="user-links-collapsible-item mw-list-item"><a href="https://donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_en.wikipedia.org&uselang=en"><span>Donate</span></a></li><li id="pt-createaccount" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Special:CreateAccount&returnto=2%2B1+road" title="You are encouraged to create an account and log in; however, it is not mandatory"><span class="vector-icon mw-ui-icon-userAdd mw-ui-icon-wikimedia-userAdd"></span> <span>Create account</span></a></li><li id="pt-login" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Special:UserLogin&returnto=2%2B1+road" title="You're encouraged to log in; however, it's not mandatory. [o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> <span>Log in</span></a></li> </ul> </div> </div> <div id="p-user-menu-anon-editor" class="vector-menu mw-portlet mw-portlet-user-menu-anon-editor" > <div class="vector-menu-heading"> Pages for logged out editors <a href="/wiki/Help:Introduction" aria-label="Learn more about editing"><span>learn more</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/Special:MyContributions" title="A list of edits made from this IP address [y]" accesskey="y"><span>Contributions</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Special:MyTalk" title="Discussion about edits from this IP address [n]" accesskey="n"><span>Talk</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Site"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Contents" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Contents</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">hide</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">(Top)</div> </a> </li> <li id="toc-By_country" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#By_country"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>By country</span> </div> </a> <button aria-controls="toc-By_country-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle By country subsection</span> </button> <ul id="toc-By_country-sublist" class="vector-toc-list"> <li id="toc-Estonia" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Estonia"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.1</span> <span>Estonia</span> </div> </a> <ul id="toc-Estonia-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Finland" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Finland"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.2</span> <span>Finland</span> </div> </a> <ul id="toc-Finland-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Germany" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Germany"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.3</span> <span>Germany</span> </div> </a> <ul id="toc-Germany-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Israel" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Israel"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.4</span> <span>Israel</span> </div> </a> <ul id="toc-Israel-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Ireland" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Ireland"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.5</span> <span>Ireland</span> </div> </a> <ul id="toc-Ireland-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Lithuania" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Lithuania"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.6</span> <span>Lithuania</span> </div> </a> <ul id="toc-Lithuania-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-New_Zealand" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#New_Zealand"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.7</span> <span>New Zealand</span> </div> </a> <ul id="toc-New_Zealand-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Portugal" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Portugal"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.8</span> <span>Portugal</span> </div> </a> <ul id="toc-Portugal-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Romania" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Romania"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.9</span> <span>Romania</span> </div> </a> <ul id="toc-Romania-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Russia" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Russia"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.10</span> <span>Russia</span> </div> </a> <ul id="toc-Russia-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Sweden" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Sweden"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.11</span> <span>Sweden</span> </div> </a> <ul id="toc-Sweden-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-United_Kingdom" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#United_Kingdom"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.12</span> <span>United Kingdom</span> </div> </a> <ul id="toc-United_Kingdom-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-United_States" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#United_States"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.13</span> <span>United States</span> </div> </a> <ul id="toc-United_States-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Elsewhere" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Elsewhere"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.14</span> <span>Elsewhere</span> </div> </a> <ul id="toc-Elsewhere-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-External_links" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#External_links"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>External links</span> </div> </a> <ul id="toc-External_links-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toggle the table of contents" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Toggle the table of contents</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">2+1 road</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Go to an article in another language. Available in 13 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-13" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">13 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/2%2B1-vej" title="2+1-vej – Danish" lang="da" hreflang="da" data-title="2+1-vej" data-language-autonym="Dansk" data-language-local-name="Danish" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Wechselseitig_dreistreifige_Stra%C3%9Fe" title="Wechselseitig dreistreifige Straße – German" lang="de" hreflang="de" data-title="Wechselseitig dreistreifige Straße" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Carretera_2%2B1" title="Carretera 2+1 – Spanish" lang="es" hreflang="es" data-title="Carretera 2+1" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Route_en_2%2B1" title="Route en 2+1 – French" lang="fr" hreflang="fr" data-title="Route en 2+1" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%9B%D7%91%D7%99%D7%A9_2%2B1" title="כביש 2+1 – Hebrew" lang="he" hreflang="he" data-title="כביש 2+1" data-language-autonym="עברית" data-language-local-name="Hebrew" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/2%2B1-weg" title="2+1-weg – Dutch" lang="nl" hreflang="nl" data-title="2+1-weg" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/2%2B1-vei" title="2+1-vei – Norwegian Bokmål" lang="nb" hreflang="nb" data-title="2+1-vei" data-language-autonym="Norsk bokmål" data-language-local-name="Norwegian Bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Droga_2%2B1" title="Droga 2+1 – Polish" lang="pl" hreflang="pl" data-title="Droga 2+1" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Drum_2%2B1_alternativ" title="Drum 2+1 alternativ – Romanian" lang="ro" hreflang="ro" data-title="Drum 2+1 alternativ" data-language-autonym="Română" data-language-local-name="Romanian" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Cesta_2%2B1" title="Cesta 2+1 – Slovak" lang="sk" hreflang="sk" data-title="Cesta 2+1" data-language-autonym="Slovenčina" data-language-local-name="Slovak" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Ohituskaistatie" title="Ohituskaistatie – Finnish" lang="fi" hreflang="fi" data-title="Ohituskaistatie" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/2%2B1-v%C3%A4g" title="2+1-väg – Swedish" lang="sv" hreflang="sv" data-title="2+1-väg" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%94%D0%BE%D1%80%D0%BE%D0%B3%D0%B0_2%2B1" title="Дорога 2+1 – Ukrainian" lang="uk" hreflang="uk" data-title="Дорога 2+1" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q3048788#sitelinks-wikipedia" title="Edit interlanguage links" class="wbc-editpage">Edit links</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Namespaces"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/2%2B1_road" title="View the content page [c]" accesskey="c"><span>Article</span></a></li><li id="ca-talk" class="vector-tab-noicon mw-list-item"><a href="/wiki/Talk:2%2B1_road" rel="discussion" title="Discuss improvements to the content page [t]" accesskey="t"><span>Talk</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Change language variant" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">English</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="Views"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/2%2B1_road"><span>Read</span></a></li><li id="ca-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=2%2B1_road&action=edit" title="Edit this page [e]" accesskey="e"><span>Edit</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=2%2B1_road&action=history" title="Past revisions of this page [h]" accesskey="h"><span>View history</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="Tools" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Tools</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Tools</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">hide</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="More options" > <div class="vector-menu-heading"> Actions </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/2%2B1_road"><span>Read</span></a></li><li id="ca-more-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=2%2B1_road&action=edit" title="Edit this page [e]" accesskey="e"><span>Edit</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=2%2B1_road&action=history"><span>View history</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> General </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Special:WhatLinksHere/2%2B1_road" title="List of all English Wikipedia pages containing links to this page [j]" accesskey="j"><span>What links here</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Special:RecentChangesLinked/2%2B1_road" rel="nofollow" title="Recent changes in pages linked from this page [k]" accesskey="k"><span>Related changes</span></a></li><li id="t-upload" class="mw-list-item"><a href="/wiki/Wikipedia:File_Upload_Wizard" title="Upload files [u]" accesskey="u"><span>Upload file</span></a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/Special:SpecialPages" title="A list of all special pages [q]" accesskey="q"><span>Special pages</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=2%2B1_road&oldid=1256504257" title="Permanent link to this revision of this page"><span>Permanent link</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=2%2B1_road&action=info" title="More information about this page"><span>Page information</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Special:CiteThisPage&page=2%2B1_road&id=1256504257&wpFormIdentifier=titleform" title="Information on how to cite this page"><span>Cite this page</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Special:UrlShortener&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2F2%252B1_road"><span>Get shortened URL</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Special:QrCode&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2F2%252B1_road"><span>Download QR code</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Print/export </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Special:DownloadAsPdf&page=2%2B1_road&action=show-download-screen" title="Download this page as a PDF file"><span>Download as PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=2%2B1_road&printable=yes" title="Printable version of this page [p]" accesskey="p"><span>Printable version</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> In other projects </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="wb-otherproject-link wb-otherproject-commons mw-list-item"><a href="https://commons.wikimedia.org/wiki/Category:2%2B1_road" hreflang="en"><span>Wikimedia Commons</span></a></li><li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q3048788" title="Structured data on this page hosted by Wikidata [g]" accesskey="g"><span>Wikidata item</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Appearance"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Appearance</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">hide</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Design of road</div> <style data-mw-deduplicate="TemplateStyles:r1251242444">.mw-parser-output .ambox{border:1px solid #a2a9b1;border-left:10px solid #36c;background-color:#fbfbfb;box-sizing:border-box}.mw-parser-output .ambox+link+.ambox,.mw-parser-output .ambox+link+style+.ambox,.mw-parser-output .ambox+link+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+style+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+link+.ambox{margin-top:-1px}html body.mediawiki .mw-parser-output .ambox.mbox-small-left{margin:4px 1em 4px 0;overflow:hidden;width:238px;border-collapse:collapse;font-size:88%;line-height:1.25em}.mw-parser-output .ambox-speedy{border-left:10px solid #b32424;background-color:#fee7e6}.mw-parser-output .ambox-delete{border-left:10px solid #b32424}.mw-parser-output .ambox-content{border-left:10px solid #f28500}.mw-parser-output .ambox-style{border-left:10px solid #fc3}.mw-parser-output .ambox-move{border-left:10px solid #9932cc}.mw-parser-output .ambox-protection{border-left:10px solid #a2a9b1}.mw-parser-output .ambox .mbox-text{border:none;padding:0.25em 0.5em;width:100%}.mw-parser-output .ambox .mbox-image{border:none;padding:2px 0 2px 0.5em;text-align:center}.mw-parser-output .ambox .mbox-imageright{border:none;padding:2px 0.5em 2px 0;text-align:center}.mw-parser-output .ambox .mbox-empty-cell{border:none;padding:0;width:1px}.mw-parser-output .ambox .mbox-image-div{width:52px}@media(min-width:720px){.mw-parser-output .ambox{margin:0 10%}}@media print{body.ns-0 .mw-parser-output .ambox{display:none!important}}</style><table class="box-More_citations_needed plainlinks metadata ambox ambox-content ambox-Refimprove" role="presentation"><tbody><tr><td class="mbox-image"><div class="mbox-image-div"><span typeof="mw:File"><a href="/wiki/File:Question_book-new.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/50px-Question_book-new.svg.png" decoding="async" width="50" height="39" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/75px-Question_book-new.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/100px-Question_book-new.svg.png 2x" data-file-width="512" data-file-height="399" /></a></span></div></td><td class="mbox-text"><div class="mbox-text-span">This article <b>needs additional citations for <a href="/wiki/Wikipedia:Verifiability" title="Wikipedia:Verifiability">verification</a></b>.<span class="hide-when-compact"> Please help <a href="/wiki/Special:EditPage/2%2B1_road" title="Special:EditPage/2+1 road">improve this article</a> by <a href="/wiki/Help:Referencing_for_beginners" title="Help:Referencing for beginners">adding citations to reliable sources</a>. Unsourced material may be challenged and removed.<br /><small><span class="plainlinks"><i>Find sources:</i> <a rel="nofollow" class="external text" href="https://www.google.com/search?as_eq=wikipedia&q=%222%2B1+road%22">"2+1 road"</a> – <a rel="nofollow" class="external text" href="https://www.google.com/search?tbm=nws&q=%222%2B1+road%22+-wikipedia&tbs=ar:1">news</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?&q=%222%2B1+road%22&tbs=bkt:s&tbm=bks">newspapers</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?tbs=bks:1&q=%222%2B1+road%22+-wikipedia">books</a> <b>·</b> <a rel="nofollow" class="external text" href="https://scholar.google.com/scholar?q=%222%2B1+road%22">scholar</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.jstor.org/action/doBasicSearch?Query=%222%2B1+road%22&acc=on&wc=on">JSTOR</a></span></small></span> <span class="date-container"><i>(<span class="date">January 2011</span>)</i></span><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:MMLNorr1.JPG" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/1/1d/MMLNorr1.JPG/220px-MMLNorr1.JPG" decoding="async" width="220" height="165" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/1d/MMLNorr1.JPG/330px-MMLNorr1.JPG 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/1d/MMLNorr1.JPG/440px-MMLNorr1.JPG 2x" data-file-width="2816" data-file-height="2112" /></a><figcaption>2+1 road with cable barrier on Road 34 near Linköping, Sweden. Classified as <a href="/wiki/Limited-access_road#Europe" title="Limited-access road">motortrafikled</a> (expressway).</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:2%2B1-vaeg-2.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/f/f5/2%2B1-vaeg-2.svg/220px-2%2B1-vaeg-2.svg.png" decoding="async" width="220" height="57" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/f5/2%2B1-vaeg-2.svg/330px-2%2B1-vaeg-2.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/f5/2%2B1-vaeg-2.svg/440px-2%2B1-vaeg-2.svg.png 2x" data-file-width="990" data-file-height="256" /></a><figcaption>Scheme of a 2+1 road</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><span><video id="mwe_player_0" poster="//upload.wikimedia.org/wikipedia/commons/thumb/c/ce/Narrowing_2%2B1_road.ogv/220px--Narrowing_2%2B1_road.ogv.jpg" controls="" preload="none" data-mw-tmh="" class="mw-file-element" width="220" height="124" data-durationhint="50" data-mwtitle="Narrowing_2+1_road.ogv" data-mwprovider="wikimediacommons" resource="/wiki/File:Narrowing_2%2B1_road.ogv"><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/c/ce/Narrowing_2%2B1_road.ogv/Narrowing_2%2B1_road.ogv.480p.vp9.webm" type="video/webm; codecs="vp9, opus"" data-transcodekey="480p.vp9.webm" data-width="854" data-height="480" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/c/ce/Narrowing_2%2B1_road.ogv/Narrowing_2%2B1_road.ogv.720p.vp9.webm" type="video/webm; codecs="vp9, opus"" data-transcodekey="720p.vp9.webm" data-width="1280" data-height="720" /><source src="//upload.wikimedia.org/wikipedia/commons/c/ce/Narrowing_2%2B1_road.ogv" type="video/ogg; codecs="theora"" data-width="1280" data-height="720" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/c/ce/Narrowing_2%2B1_road.ogv/Narrowing_2%2B1_road.ogv.144p.mjpeg.mov" type="video/quicktime" data-transcodekey="144p.mjpeg.mov" data-width="256" data-height="144" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/c/ce/Narrowing_2%2B1_road.ogv/Narrowing_2%2B1_road.ogv.240p.vp9.webm" type="video/webm; codecs="vp9, opus"" data-transcodekey="240p.vp9.webm" data-width="426" data-height="240" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/c/ce/Narrowing_2%2B1_road.ogv/Narrowing_2%2B1_road.ogv.360p.webm" type="video/webm; codecs="vp8, vorbis"" data-transcodekey="360p.webm" data-width="640" data-height="360" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/c/ce/Narrowing_2%2B1_road.ogv/Narrowing_2%2B1_road.ogv.360p.vp9.webm" type="video/webm; codecs="vp9, opus"" data-transcodekey="360p.vp9.webm" data-width="640" data-height="360" /></video></span><figcaption>Driving on a Swedish 2+1 road as it narrows from 2 lanes to 1</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><span><video id="mwe_player_1" poster="//upload.wikimedia.org/wikipedia/commons/thumb/2/23/Ending_2%2B1_road.ogv/220px--Ending_2%2B1_road.ogv.jpg" controls="" preload="none" data-mw-tmh="" class="mw-file-element" width="220" height="124" data-durationhint="60" data-mwtitle="Ending_2+1_road.ogv" data-mwprovider="wikimediacommons" resource="/wiki/File:Ending_2%2B1_road.ogv"><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/2/23/Ending_2%2B1_road.ogv/Ending_2%2B1_road.ogv.480p.vp9.webm" type="video/webm; codecs="vp9, opus"" data-transcodekey="480p.vp9.webm" data-width="854" data-height="480" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/2/23/Ending_2%2B1_road.ogv/Ending_2%2B1_road.ogv.720p.vp9.webm" type="video/webm; codecs="vp9, opus"" data-transcodekey="720p.vp9.webm" data-width="1280" data-height="720" /><source src="//upload.wikimedia.org/wikipedia/commons/2/23/Ending_2%2B1_road.ogv" type="video/ogg; codecs="theora"" data-width="1280" data-height="720" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/2/23/Ending_2%2B1_road.ogv/Ending_2%2B1_road.ogv.144p.mjpeg.mov" type="video/quicktime" data-transcodekey="144p.mjpeg.mov" data-width="256" data-height="144" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/2/23/Ending_2%2B1_road.ogv/Ending_2%2B1_road.ogv.240p.vp9.webm" type="video/webm; codecs="vp9, opus"" data-transcodekey="240p.vp9.webm" data-width="426" data-height="240" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/2/23/Ending_2%2B1_road.ogv/Ending_2%2B1_road.ogv.360p.webm" type="video/webm; codecs="vp8, vorbis"" data-transcodekey="360p.webm" data-width="640" data-height="360" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/2/23/Ending_2%2B1_road.ogv/Ending_2%2B1_road.ogv.360p.vp9.webm" type="video/webm; codecs="vp9, opus"" data-transcodekey="360p.vp9.webm" data-width="640" data-height="360" /></video></span><figcaption>As the 2+1 road ends, overtaking cars face oncoming traffic.</figcaption></figure> <p><b>2+1 road</b> is a specific category of three-lane <a href="/wiki/Road" title="Road">road</a>, consisting of two lanes in one direction and one lane in the other, alternating every few kilometres, and usually separated with a steel <a href="/wiki/Cable_barrier" title="Cable barrier">cable barrier</a>. The second lane allows faster-moving traffic to <a href="/wiki/Overtake" class="mw-redirect" title="Overtake">overtake</a> slower vehicles at regular intervals. Traditional roads of at least 10 metres (33 ft) width can be converted to 2+1 roads and reach near-<a href="/wiki/Motorway" class="mw-redirect" title="Motorway">motorway</a> safety levels at a much lower cost than an actual conversion to motorway or <a href="/wiki/Dual_carriageway" title="Dual carriageway">dual carriageway</a>. </p><p>Sometimes, during freeway reconstruction, a <a href="/wiki/Barrier_transfer_machine" title="Barrier transfer machine">barrier transfer machine</a> will be used on one half of the freeway while the other is being reconstructed. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="By_country">By country</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=2%2B1_road&action=edit&section=1" title="Edit section: By country"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Estonia">Estonia</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=2%2B1_road&action=edit&section=2" title="Edit section: Estonia"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The construction of 2+1 roads in Estonia first started in autumn 2016, when a contract for a reconstruction of a 9 kilometre section of the <a href="/wiki/Estonian_national_road_4" title="Estonian national road 4">national road 4</a> between <a href="/wiki/%C3%84%C3%A4sm%C3%A4e" title="Ääsmäe">Ääsmäe</a> and <a href="/wiki/Kohatu" title="Kohatu">Kohatu</a> into a 2+1 road was signed.<sup id="cite_ref-Nordecon_1-0" class="reference"><a href="#cite_note-Nordecon-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> The road is being reconstructed as a 15-metre-wide (49 ft) 2+1 road, equipped with barriers along the entire length.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p><p>Also there are several sections of the <a href="/wiki/Estonian_national_road_2" title="Estonian national road 2">national road 2</a> between <a href="/wiki/P%C3%B5ltsamaa" title="Põltsamaa">Põltsamaa</a> and <a href="/wiki/Tartu" title="Tartu">Tartu</a> planned for a conversion into 2+1 road. The first of them (<a href="/wiki/Annikvere,_J%C3%B5geva_County" title="Annikvere, Jõgeva County">Annikvere</a>-<a href="/wiki/Neanurme" title="Neanurme">Neanurme</a>) was opened in November 2017. The speed limits are 100 km/h (60 mph) during summer and 90 km/h (55 mph) during winter.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Finland">Finland</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=2%2B1_road&action=edit&section=3" title="Edit section: Finland"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Orivesi_Jyv%C3%A4skyl%C3%A4ntie.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/c/cb/Orivesi_Jyv%C3%A4skyl%C3%A4ntie.jpg/220px-Orivesi_Jyv%C3%A4skyl%C3%A4ntie.jpg" decoding="async" width="220" height="125" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/cb/Orivesi_Jyv%C3%A4skyl%C3%A4ntie.jpg/330px-Orivesi_Jyv%C3%A4skyl%C3%A4ntie.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/cb/Orivesi_Jyv%C3%A4skyl%C3%A4ntie.jpg/440px-Orivesi_Jyv%C3%A4skyl%C3%A4ntie.jpg 2x" data-file-width="2800" data-file-height="1592" /></a><figcaption>2+1 section of the <a href="/wiki/Finnish_national_road_9" title="Finnish national road 9">Finnish national road 9</a> in <a href="/wiki/Orivesi" title="Orivesi">Orivesi</a>, <a href="/wiki/Pirkanmaa" title="Pirkanmaa">Pirkanmaa</a>, Finland</figcaption></figure> <p>The first 2+1 road in Finland was opened in 1991 on <a href="/wiki/Finnish_national_road_4" title="Finnish national road 4">Finnish national road 4</a> between <a href="/wiki/J%C3%A4rvenp%C3%A4%C3%A4" title="Järvenpää">Järvenpää</a> and <a href="/wiki/M%C3%A4nts%C3%A4l%C3%A4" title="Mäntsälä">Mäntsälä</a>, which later was upgraded to a motorway. Since then, numerous 2+1 roads have been built as part of the national road network. They resemble motorways in that they are typically, although not always, <a href="/wiki/Limited-access_road" title="Limited-access road">limited-access roads</a> and have no at-grade interchanges. In the mid-1990s, 2+1 roads with traffic separators were introduced; these are effective in preventing head-on collisions, and approaching the safety of motorways.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> In 2006, there were 440 km of 2+1 roads, <sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> e.g. along <a href="/wiki/Finnish_national_road_3" title="Finnish national road 3">road 3</a> and <a href="/wiki/Finnish_national_road_4" title="Finnish national road 4">road 4</a>. However, they weren't that much of a panacea: interchanges made the roads much more expensive than planned and confusing to drivers. Thus, new construction halted and only 2+2 roads with traffic separators were built. These are however more expensive and require more widening of the road.<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Germany">Germany</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=2%2B1_road&action=edit&section=4" title="Edit section: Germany"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:B_54_bei_Steinfurt.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/8/84/B_54_bei_Steinfurt.jpg/220px-B_54_bei_Steinfurt.jpg" decoding="async" width="220" height="165" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/84/B_54_bei_Steinfurt.jpg/330px-B_54_bei_Steinfurt.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/84/B_54_bei_Steinfurt.jpg/440px-B_54_bei_Steinfurt.jpg 2x" data-file-width="640" data-file-height="480" /></a><figcaption>2+1 section of B54 near Steinfurt</figcaption></figure> <p>The "2+1-System" refers to expressways with three lanes on a single carriageway where bypassing on the lane of the opposite direction is prohibited so that speed restriction is not required to increase safety. These expressways are grade-separated with a design speed of 100 to 120 km/h (60 to 75 mph) and the side of two lanes (allowing to bypass lower speed vehicles) alternates about every 1.5 to 2 kilometres. In hilly parts, the uphill direction is usually the one with two lanes to allow overtaking of heavy, slow vehicles. In many cases, there is no median barrier or it consists of concrete blocks – additional safety measures are mostly needed near the end of the two lane section where some motorists tend to pull in very late so that a longer no-traffic section needs to be inserted on the middle lane. </p><p>After some good experiences with test roads the system has been used often in places where the amount of traffic does not justify construction of a <a href="/wiki/Dual_carriageway" title="Dual carriageway">dual carriageway</a> expressway but remote rural areas should be connected to major towns with a high speed road. Existing examples are <a href="/wiki/Bundesstra%C3%9Fe_1" title="Bundesstraße 1">B 1</a>, <a href="/wiki/Bundesstra%C3%9Fe_4" title="Bundesstraße 4">B 4</a> near Uelzen, <a href="/wiki/Bundesstra%C3%9Fe_16" title="Bundesstraße 16">B 16</a>, <a href="/w/index.php?title=Bundesstra%C3%9Fe_20&action=edit&redlink=1" class="new" title="Bundesstraße 20 (page does not exist)">B 20</a>, <a href="/wiki/Bundesstra%C3%9Fe_31" title="Bundesstraße 31">B 31n</a> near Stockach (120 km/h (75 mph)), <a href="/w/index.php?title=Bundesstra%C3%9Fe_33&action=edit&redlink=1" class="new" title="Bundesstraße 33 (page does not exist)">B 33</a>, <a href="/wiki/Bundesstra%C3%9Fe_54" title="Bundesstraße 54">B 54</a>, <a href="/w/index.php?title=Bundesstra%C3%9Fe_56&action=edit&redlink=1" class="new" title="Bundesstraße 56 (page does not exist)">B 56n</a>, <a href="/w/index.php?title=Bundesstra%C3%9Fe_67&action=edit&redlink=1" class="new" title="Bundesstraße 67 (page does not exist)">B 67</a> between Bocholt-West and Borken, <a href="/w/index.php?title=Bundesstra%C3%9Fe_72&action=edit&redlink=1" class="new" title="Bundesstraße 72 (page does not exist)">B 72</a>, <a href="/w/index.php?title=Bundesstra%C3%9Fe_210&action=edit&redlink=1" class="new" title="Bundesstraße 210 (page does not exist)">B 210</a>, <a href="/wiki/Bundesstra%C3%9Fe_300" title="Bundesstraße 300">B 300</a>, <a href="/w/index.php?title=Bundesstra%C3%9Fe_473&action=edit&redlink=1" class="new" title="Bundesstraße 473 (page does not exist)">B 473</a> between Bocholt and Hamminkeln, <a href="/w/index.php?title=Bundesstra%C3%9Fe_482&action=edit&redlink=1" class="new" title="Bundesstraße 482 (page does not exist)">B 482</a> and parts of the <a href="/wiki/Bundesautobahn_98" title="Bundesautobahn 98">A 98</a>. </p> <div class="mw-heading mw-heading3"><h3 id="Israel">Israel</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=2%2B1_road&action=edit&section=5" title="Edit section: Israel"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In <a href="/wiki/Israel" title="Israel">Israel</a>, route 437 is a 2+1 from Hizme Junction to Adam Junction. The road descends before ascending, and whichever direction is uphill is the one with two lanes. </p> <div class="mw-heading mw-heading3"><h3 id="Ireland">Ireland</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=2%2B1_road&action=edit&section=6" title="Edit section: Ireland"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In the <a href="/wiki/Republic_of_Ireland" title="Republic of Ireland">Republic of Ireland</a>, a 2+1 road was tried on a short section of the <a href="/wiki/N20_road" class="mw-redirect" title="N20 road">N20</a> near <a href="/wiki/Mallow,_County_Cork" title="Mallow, County Cork">Mallow</a>, <a href="/wiki/County_Cork" title="County Cork">County Cork</a> and the <a href="/wiki/N2_road" class="mw-redirect" title="N2 road">N2</a> near <a href="/wiki/Castleblayney" title="Castleblayney">Castleblayney</a>, <a href="/wiki/County_Monaghan" title="County Monaghan">County Monaghan</a>. Following the pilot, the <a href="/wiki/National_Roads_Authority" title="National Roads Authority">National Roads Authority</a> announced in July 2007 that 2+1 roads were unsuitable and that new lower capacity trunk routes would instead be built as <a href="/wiki/2%2B2_road" title="2+2 road">2+2 roads</a> (officially known as "Type 2 Dual Carriageways")<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> – at grade <a href="/wiki/Dual-carriageways" class="mw-redirect" title="Dual-carriageways">dual-carriageways</a> with a narrow median and no hard shoulder. </p> <div class="mw-heading mw-heading3"><h3 id="Lithuania">Lithuania</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=2%2B1_road&action=edit&section=7" title="Edit section: Lithuania"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The first rural 2+1 road section finished in Lithuania was a short <span class="nowrap"><span data-sort-value="7003150000000000000♠"></span>1.5 km</span> road section of A11 between <a href="/wiki/%C5%A0iauliai" title="Šiauliai">Šiauliai</a> and the junction with the A18 road (<a href="/wiki/%C5%A0iauliai" title="Šiauliai">Šiauliai</a> Bypass). It was opened in late 2017. </p><p>All 1+1 sections of <a href="/wiki/Via_Baltica" class="mw-redirect" title="Via Baltica">Via Baltica</a> north of <a href="/wiki/Kaunas" title="Kaunas">Kaunas</a> up to the <a href="/wiki/Latvia" title="Latvia">Latvian</a> border are planned to be converted to 2+1 by 2035. The first section, the A17 road or <a href="/wiki/Panev%C4%97%C5%BEys" title="Panevėžys">Panevėžys</a> Bypass was constructed in 2019. Work took place in stages. The first <span class="nowrap"><span data-sort-value="7004100000000000000♠"></span>10 km</span> section between junctions with the A8 and the A9 was finished in summer 2018. The remaining section up to the A10 road was completed in 2019. </p><p>All planned 2+1 sections will be equipped with barriers. </p> <div class="mw-heading mw-heading3"><h3 id="New_Zealand">New Zealand</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=2%2B1_road&action=edit&section=8" title="Edit section: New Zealand"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In New Zealand, there are few 2+1 roads, although regular isolated 'passing lanes' exist frequently throughout the country, mainly in heavily trafficked areas and on hills. A trial of a 2+1 road with a wire-rope median barrier was undertaken on SH1 between Longswamp and Rangiriri south of Auckland, and there are plans to introduce more 2+1 roads. NZ research also investigated the design and operational effects of 2+1 roads to establish the most appropriate configurations for the country.<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Portugal">Portugal</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=2%2B1_road&action=edit&section=9" title="Edit section: Portugal"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In Portugal, there are plenty of 2+1 roads. Almost every national road in the country has a 2+1 profile, but the biggest part is located in the north because of the hills (for example, in <a href="/wiki/Beira_Baixa_Province" title="Beira Baixa Province">Beira Baixa</a>, or <a href="/wiki/Viseu_District" title="Viseu District">Viseu</a>). One example of this is the N2 road, which goes from <a href="/wiki/Faro,_Portugal" title="Faro, Portugal">Faro</a> (<a href="/wiki/Algarve" title="Algarve">Algarve</a>) to <a href="/wiki/Chaves,_Portugal" title="Chaves, Portugal">Chaves</a>. Also, this type of road isn't frequently used on parts of roads that have a village near, except in the <a href="/wiki/Lisbon_District" title="Lisbon District">Lisbon District</a> where most of them have that profile. In Portugal, there are 4 (major) types of roads: a national road (N) which sometimes contains the 2+1 profile, a complementary route (IC), which always contains the 2+1 profile, except inside villages, a principal route (IP) which either contains the 2+1 profile (with the IC profile) or the 2+2 profile (with the A profile) and a highway (A) which has its own profiles, like 2+2, 3+3 or 4+4. </p> <div class="mw-heading mw-heading3"><h3 id="Romania">Romania</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=2%2B1_road&action=edit&section=10" title="Edit section: Romania"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:2%2B1_road_on_the_DN7,_Olt_Valley_section,_Romania.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/d/d3/2%2B1_road_on_the_DN7%2C_Olt_Valley_section%2C_Romania.jpg/220px-2%2B1_road_on_the_DN7%2C_Olt_Valley_section%2C_Romania.jpg" decoding="async" width="220" height="165" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/d3/2%2B1_road_on_the_DN7%2C_Olt_Valley_section%2C_Romania.jpg/330px-2%2B1_road_on_the_DN7%2C_Olt_Valley_section%2C_Romania.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/d3/2%2B1_road_on_the_DN7%2C_Olt_Valley_section%2C_Romania.jpg/440px-2%2B1_road_on_the_DN7%2C_Olt_Valley_section%2C_Romania.jpg 2x" data-file-width="4608" data-file-height="3456" /></a><figcaption>The first 2+1 road section in Romania on the DN7. Note the lack of separating barriers.</figcaption></figure><p>The 2+1 road format in Romania often refers to sections, usually on steep inclines, where there is another lane, designed to be used by slow vehicles to avoid congestion when going uphill. </p><p>The first 2+1 "alternative" road opened between <a href="/wiki/Boi%C8%9Ba" title="Boița">Lazaret</a> and <a href="/w/index.php?title=Turnul_Spart&action=edit&redlink=1" class="new" title="Turnul Spart (page does not exist)">Turnul Spart</a> in 2018 on the Olt Valley section of the <a href="/wiki/DN7" title="DN7">DN7</a>. This section lacks cable barriers, but provisions have been made to install one, if needed. The next 2+1 road section to open will be between <a href="/wiki/Sine%C8%99ti,_Ialomi%C8%9Ba" title="Sinești, Ialomița">Sinești</a> and <a href="/wiki/Movili%C8%9Ba,_Ialomi%C8%9Ba" title="Movilița, Ialomița">Movilița</a> on the DN2. The <a href="/wiki/DN2" title="DN2">DN2</a> is currently configured as a 13 m wide road with emergency lanes, in the same style as 13 m wide roads in Sweden, however, drivers improperly use the emergency lanes, leading to the current high number of crashes. </p><p>Once the roadworks will be completed, the 2+1 road is supposed to reduce the number of crashes, but it will lack the essential cable barrier. This is because the only cable barrier installed in Romania, at <a href="/wiki/Afuma%C8%9Bi,_Ilfov" title="Afumați, Ilfov">Afumați</a> on the same DN2 was damaged because the lanes were too close to it and a truck hit it, but instead, the Romanian Roads Administration (CNADNR) blamed the "unsafety" of the barrier. </p> <div class="mw-heading mw-heading3"><h3 id="Russia">Russia</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=2%2B1_road&action=edit&section=11" title="Edit section: Russia"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Kresttsy,_Novgorod_Oblast,_Russia_-_panoramio_(3).jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/7/75/Kresttsy%2C_Novgorod_Oblast%2C_Russia_-_panoramio_%283%29.jpg/220px-Kresttsy%2C_Novgorod_Oblast%2C_Russia_-_panoramio_%283%29.jpg" decoding="async" width="220" height="165" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/75/Kresttsy%2C_Novgorod_Oblast%2C_Russia_-_panoramio_%283%29.jpg/330px-Kresttsy%2C_Novgorod_Oblast%2C_Russia_-_panoramio_%283%29.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/75/Kresttsy%2C_Novgorod_Oblast%2C_Russia_-_panoramio_%283%29.jpg/440px-Kresttsy%2C_Novgorod_Oblast%2C_Russia_-_panoramio_%283%29.jpg 2x" data-file-width="2048" data-file-height="1536" /></a><figcaption>M10 road in <a href="/wiki/Kresttsy,_Krestetsky_District,_Novgorod_Oblast" title="Kresttsy, Krestetsky District, Novgorod Oblast">Kresttsy</a>. Due to the bad condition of road surface, a huge number of fatalities still happen.</figcaption></figure> <p>Some federal roads use the 2+1 design. The length of overtaking sections is 400 to 3,000 metres. Unlike in Western Europe, the majority of Russian 2+1 roads are not equipped with barriers and have a mediocre quality of the road surface. The most well-known example of a 2+1 is the M-10 road section between <a href="/wiki/Tver" title="Tver">Tver</a> and <a href="/wiki/Novgorod_Oblast" title="Novgorod Oblast">Novgorod Oblast</a>. Other than that, the 2+1 roads are particularly popular in <a href="/wiki/Krasnodar_Krai" title="Krasnodar Krai">Krasnodar Krai</a> and <a href="/wiki/Sakhalin_Oblast" title="Sakhalin Oblast">Sakhalin Oblast</a>. </p> <div class="mw-heading mw-heading3"><h3 id="Sweden">Sweden</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=2%2B1_road&action=edit&section=12" title="Edit section: Sweden"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:E20_2plus1_west_of_Skara.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/9/94/E20_2plus1_west_of_Skara.jpg/220px-E20_2plus1_west_of_Skara.jpg" decoding="async" width="220" height="165" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/94/E20_2plus1_west_of_Skara.jpg/330px-E20_2plus1_west_of_Skara.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/94/E20_2plus1_west_of_Skara.jpg/440px-E20_2plus1_west_of_Skara.jpg 2x" data-file-width="1600" data-file-height="1200" /></a><figcaption>2+1 road with cable barrier near Skara, Sweden</figcaption></figure> <p>In Sweden, many 13-metre-wide (43 ft) roads have been built, especially in the period 1955–1980. These have two 3.5-metre-wide (11 ft) lanes, and two 3-metre-wide (9.8 ft) shoulders, in the beginning planned as emergency strip, due to the relative unreliability of cars of that period. </p><p>Around 1990, the idea emerged to build fences in the middle of them and to have 2+1 lanes. This was thought to be a cheap way of increasing traffic safety since these roads had a bad safety record of many head-on collisions at high speeds. Some people were, for example, overtaking against meeting traffic assuming meeting cars would go to the side. The roads are a little narrow for 3 lanes, but trials were carried out on a few roads. It turned out that not only did safety improve, but it was also easier to overtake than before as the 2-lane sections provide safe overtaking opportunities. After the year 2000, more than 1,000 km (620 mi) of roads in Sweden have been converted from wide ordinary roads into 2+1-road, all with barriers.<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> </p><p>Until around 2005, the roads had the original 90 km/h (56 mph) speed limit in use on most highways. As a result of this, many people drove at 90 km/h at 1-lane parts but 110 km/h (68 mph) at 2-lane parts, this being the speed limit on motorways. The speed limit has now been changed to 100 km/h (62 mph) with a notably smoother traffic flow. There is a problem that some people want to overtake as many slow cars as possible in the two-lane sections, sometimes with small margins at the end of the section. </p> <div class="mw-heading mw-heading3"><h3 id="United_Kingdom">United Kingdom</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=2%2B1_road&action=edit&section=13" title="Edit section: United Kingdom"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In the UK, 2+1 roads are known as 'Wide single 2+1 roads'. According to the Design Manual for Roads and Bridges, they should only be used on rural all-purpose single carriageways. The overtaking lane sections can be between 800 metres and 1500 metres. This is because this length allows for cars to overtake, but does not cause frustration for drivers on single-lane sections. It is recommended to use hatching with double solid lines to separate traffic flows to stop single-lane traffic from using the oncoming overtaking lane. 2+1 roads can also be used for climbing lanes, to allow slower vehicles to be overtaken by other vehicles when travelling uphill on a single carriageway. They should be used where the road is longer than 500 metres at a gradient of 2%.<sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="United_States">United States</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=2%2B1_road&action=edit&section=14" title="Edit section: United States"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:State_route_77_in_the_salt_river_canyon,_arizona.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/State_route_77_in_the_salt_river_canyon%2C_arizona.jpg/220px-State_route_77_in_the_salt_river_canyon%2C_arizona.jpg" decoding="async" width="220" height="179" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/State_route_77_in_the_salt_river_canyon%2C_arizona.jpg/330px-State_route_77_in_the_salt_river_canyon%2C_arizona.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4c/State_route_77_in_the_salt_river_canyon%2C_arizona.jpg/440px-State_route_77_in_the_salt_river_canyon%2C_arizona.jpg 2x" data-file-width="1000" data-file-height="814" /></a><figcaption>Arizona State Route 77</figcaption></figure> <p>The United States has 2+1 roads in states such as <a href="/wiki/California" title="California">California</a>, <a href="/wiki/New_Hampshire" title="New Hampshire">New Hampshire</a>, Arkansas, and <a href="/wiki/Missouri" title="Missouri">Missouri</a>. The most prominent example is <a href="/wiki/Interstate_93" title="Interstate 93">Interstate 93</a> in <a href="/wiki/Franconia_Notch_State_Park" title="Franconia Notch State Park">Franconia Notch State Park</a> (before dropping down to a single lane in each direction, plus a steel divider). The mode is not unknown in the United States off Interstate roads, including for example <a href="/wiki/California_State_Route_1" title="California State Route 1">California State Route 1</a> between <a href="/wiki/Malibu,_California" title="Malibu, California">Malibu</a> and <a href="/wiki/Oxnard,_California" title="Oxnard, California">Oxnard</a>, <a href="/wiki/Arizona_State_Route_77" title="Arizona State Route 77">Arizona State Route 77</a> north of <a href="/wiki/Oracle,_Arizona" title="Oracle, Arizona">Oracle</a>, U.S. Route 412 between Salem and Mountain Home, and the section of <a href="/wiki/Missouri_Route_5" title="Missouri Route 5">Missouri Route 5</a> between the towns of <a href="/wiki/Lebanon,_Missouri" title="Lebanon, Missouri">Lebanon</a> and <a href="/wiki/Camdenton,_Missouri" title="Camdenton, Missouri">Camdenton</a>.<sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> In the United States, this term is not used and roads that would be in a configuration that could be described as 2+1 usually have an extra added climbing lane on steep grades for trucks and slow vehicles to climb or are dropping or expanding to 2 or 4 lanes respectively. </p><p>These roads also exist in <a href="/wiki/Texas" title="Texas">Texas</a>, called "<a href="/wiki/Super_two" title="Super two">Super 2</a>", as that term has more than one definition.<sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> </p><p>In the 1950s, <a href="/wiki/New_York_(state)" title="New York (state)">New York</a> state built many highways which totalled 3 lanes wide, with traffic moving in either direction permitted to use the center lane for passing.<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (April 2019)">citation needed</span></a></i>]</sup> After less than ten years of <a href="/wiki/Suicide_lane" class="mw-redirect" title="Suicide lane">a frighteningly high head-on collision rate</a>, all were re-striped into either two wide lanes, or a one-direction passing lane, or alternating between the two systems. </p> <div class="mw-heading mw-heading3"><h3 id="Elsewhere">Elsewhere</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=2%2B1_road&action=edit&section=15" title="Edit section: Elsewhere"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:9382Southern_Tagalog_Arterial_Road_12.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/9382Southern_Tagalog_Arterial_Road_12.jpg/220px-9382Southern_Tagalog_Arterial_Road_12.jpg" decoding="async" width="220" height="165" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/9382Southern_Tagalog_Arterial_Road_12.jpg/330px-9382Southern_Tagalog_Arterial_Road_12.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/aa/9382Southern_Tagalog_Arterial_Road_12.jpg/440px-9382Southern_Tagalog_Arterial_Road_12.jpg 2x" data-file-width="4608" data-file-height="3456" /></a><figcaption><a href="/wiki/Southern_Tagalog_Arterial_Road" title="Southern Tagalog Arterial Road">STAR Tollway</a> in <a href="/wiki/Batangas_City" title="Batangas City">Batangas City</a>, <a href="/wiki/Philippines" title="Philippines">Philippines</a></figcaption></figure> <p>Divided 2+1 roads are rare outside of Europe and the United States, though they are seen in a few places, such as <a href="/wiki/Australia" title="Australia">Australia</a> and the Canadian provinces of <a href="/wiki/Ontario" title="Ontario">Ontario</a> and <a href="/wiki/Quebec" title="Quebec">Quebec</a>. In Japan, a 2+1 road was implemented in the northern island of Hokkaido.<sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=2%2B1_road&action=edit&section=16" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Reversible_lane" title="Reversible lane">Reversible lane</a></li> <li><a href="/wiki/Road_diet" title="Road diet">Road diet</a></li> <li><a href="/wiki/Two-lane_expressway" title="Two-lane expressway">Two-lane expressway</a></li> <li><a href="/wiki/Super_two" title="Super two">Super 2</a></li> <li><a href="/wiki/2-1_road" title="2-1 road">2-1 road</a></li> <li><a href="/wiki/Dual_carriageway" title="Dual carriageway">Dual carriageway</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=2%2B1_road&action=edit&section=17" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-Nordecon-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-Nordecon_1-0">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation news cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20180106120504/http://www.nordecon.com/news/nordecon-and-road-administration-signed-the-contract-for-the-n2844">"Nordecon and Road Administration signed the contract for the construction of first 2+1 passing lanes on Tallinn-Pärnu-Ikla road"</a>. Nordecon. 26 October 2016. Archived from <a rel="nofollow" class="external text" href="http://www.nordecon.com/news/nordecon-and-road-administration-signed-the-contract-for-the-n2844">the original</a> on 6 January 2018<span class="reference-accessdate">. Retrieved <span class="nowrap">6 January</span> 2018</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=Nordecon+and+Road+Administration+signed+the+contract+for+the+construction+of+first+2%2B1+passing+lanes+on+Tallinn-P%C3%A4rnu-Ikla+road&rft.date=2016-10-26&rft_id=http%3A%2F%2Fwww.nordecon.com%2Fnews%2Fnordecon-and-road-administration-signed-the-contract-for-the-n2844&rfr_id=info%3Asid%2Fen.wikipedia.org%3A2%2B1+road" class="Z3988"></span></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1 cs1-prop-foreign-lang-source"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20180106173329/https://www.mnt.ee/et/ehitus/aasmae-kohatu-21-moodasoidualade-ehitus">"Ääsmäe–Kohatu 2+1 möödasõidualade ehitus"</a>. <i>www.mnt.ee</i> (in Estonian). Maanteeamet. 4 November 2016. Archived from <a rel="nofollow" class="external text" href="https://www.mnt.ee/et/ehitus/aasmae-kohatu-21-moodasoidualade-ehitus">the original</a> on 6 January 2018<span class="reference-accessdate">. Retrieved <span class="nowrap">6 January</span> 2018</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=www.mnt.ee&rft.atitle=%C3%84%C3%A4sm%C3%A4e%E2%80%93Kohatu+2%2B1+m%C3%B6%C3%B6das%C3%B5idualade+ehitus&rft.date=2016-11-04&rft_id=https%3A%2F%2Fwww.mnt.ee%2Fet%2Fehitus%2Faasmae-kohatu-21-moodasoidualade-ehitus&rfr_id=info%3Asid%2Fen.wikipedia.org%3A2%2B1+road" class="Z3988"></span></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1 cs1-prop-foreign-lang-source"><a rel="nofollow" class="external text" href="https://www.err.ee/641629/tallinna-tartu-maantee-esimene-2-1-moodasoiduala-avatakse-liiklusele">"Tallinna-Tartu maantee esimene 2+1 möödasõiduala avatakse liiklusele"</a>. <i><a href="/wiki/Eesti_Rahvusringh%C3%A4%C3%A4ling" title="Eesti Rahvusringhääling">ERR</a></i> (in Estonian). 9 November 2017<span class="reference-accessdate">. Retrieved <span class="nowrap">2 January</span> 2018</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=ERR&rft.atitle=Tallinna-Tartu+maantee+esimene+2%2B1+m%C3%B6%C3%B6das%C3%B5iduala+avatakse+liiklusele&rft.date=2017-11-09&rft_id=https%3A%2F%2Fwww.err.ee%2F641629%2Ftallinna-tartu-maantee-esimene-2-1-moodasoiduala-avatakse-liiklusele&rfr_id=info%3Asid%2Fen.wikipedia.org%3A2%2B1+road" class="Z3988"></span></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text">S12 Pääteiden parantamisratkaisut - Uudet tietyyppivaihtoehdot - Yhteenveto suunnitelmatason tietyyppitarkasteluista. Tiehallinnon selvityksiä 44/2003. <a rel="nofollow" class="external autonumber" href="https://julkaisut.liikennevirasto.fi/pdf/3200831-vuudettietyyppivaihtoehdot.pdf">[1]</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20180223051220/https://julkaisut.liikennevirasto.fi/pdf/3200831-vuudettietyyppivaihtoehdot.pdf">Archived</a> 2018-02-23 at the <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a></span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.lvm.fi/documents/20181/759303/Ty%C3%B6ryhm%C3%A4n+esitys.pdf/4c479640-eb10-46d2-a4dc-9b04537d8e7b?version=1.0">"Työryhmän esitys Suomen maaliikenteen runkoväyliksi"</a>. www.lvm.fi<span class="reference-accessdate">. Retrieved <span class="nowrap">2021-06-02</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Ty%C3%B6ryhm%C3%A4n+esitys+Suomen+maaliikenteen+runkov%C3%A4yliksi&rft.pub=www.lvm.fi&rft_id=https%3A%2F%2Fwww.lvm.fi%2Fdocuments%2F20181%2F759303%2FTy%25C3%25B6ryhm%25C3%25A4n%2Besitys.pdf%2F4c479640-eb10-46d2-a4dc-9b04537d8e7b%3Fversion%3D1.0&rfr_id=info%3Asid%2Fen.wikipedia.org%3A2%2B1+road" class="Z3988"></span><sup class="noprint Inline-Template"><span style="white-space: nowrap;">[<i><a href="/wiki/Wikipedia:Link_rot" title="Wikipedia:Link rot"><span title=" Dead link tagged September 2024">permanent dead link</span></a></i><span style="visibility:hidden; color:transparent; padding-left:2px">‍</span>]</span></sup></span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-6">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://yle.fi/uutiset/suomen_teille_loytyi_halpa_ja_helppo_hengenpelastaja__josta_tulikin_kallis_ja_hankala/7886271">"Suomen teille löytyi halpa ja helppo hengenpelastaja – josta tulikin kallis ja hankala"</a>. <i>Yle Uutiset</i>. 31 March 2015.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Yle+Uutiset&rft.atitle=Suomen+teille+l%C3%B6ytyi+halpa+ja+helppo+hengenpelastaja+%E2%80%93+josta+tulikin+kallis+ja+hankala&rft.date=2015-03-31&rft_id=http%3A%2F%2Fyle.fi%2Fuutiset%2Fsuomen_teille_loytyi_halpa_ja_helppo_hengenpelastaja__josta_tulikin_kallis_ja_hankala%2F7886271&rfr_id=info%3Asid%2Fen.wikipedia.org%3A2%2B1+road" class="Z3988"></span></span> </li> <li id="cite_note-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-7">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://www.nra.ie/RoadSchemeActivity/WaterfordCountyCouncil/N25KilmacthomasBypass22/SchemeName,9948,en.html">www.nra.ie.</a><sup class="noprint Inline-Template"><span style="white-space: nowrap;">[<i><a href="/wiki/Wikipedia:Link_rot" title="Wikipedia:Link rot"><span title=" Dead link tagged August 2019">permanent dead link</span></a></i><span style="visibility:hidden; color:transparent; padding-left:2px">‍</span>]</span></sup> Retrieved January 16, 2019.</span> </li> <li id="cite_note-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-8">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.nzta.govt.nz/resources/research/reports/549/">"Research Report 549 Operating characteristics and economic evaluation of 2+1 lanes with or without intelligent transport systems assisted merging | NZ Transport Agency"</a>. <i>www.nzta.govt.nz</i>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=www.nzta.govt.nz&rft.atitle=Research+Report+549+Operating+characteristics+and+economic+evaluation+of+2%2B1+lanes+with+or+without+intelligent+transport+systems+assisted+merging+%26%23124%3B+NZ+Transport+Agency&rft_id=https%3A%2F%2Fwww.nzta.govt.nz%2Fresources%2Fresearch%2Freports%2F549%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3A2%2B1+road" class="Z3988"></span></span> </li> <li id="cite_note-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-9">^</a></b></span> <span class="reference-text"><a href="https://sv.wikipedia.org/wiki/2%2B1-v%C3%A4g" class="extiw" title="sv:2+1-väg">Swedish Wikipedia</a></span> </li> <li id="cite_note-10"><span class="mw-cite-backlink"><b><a href="#cite_ref-10">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.thenbs.com/PublicationIndex/documents/details?Pub=HA&DocID=328815">"DMRB Volume 6 Section 1 CD 109 Revision 1 Road layout. Design. Highway link design (formerly TD 9/93, TD 70/08)"</a>. <i>NBS</i>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20210503141623/https://www.thenbs.com/PublicationIndex/documents/details?Pub=HA&DocID=328815">Archived</a> from the original on 2021-05-03.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=NBS&rft.atitle=DMRB+Volume+6+Section+1+CD+109+Revision+1+Road+layout.+Design.+Highway+link+design+%28formerly+TD+9%2F93%2C+TD+70%2F08%29&rft_id=https%3A%2F%2Fwww.thenbs.com%2FPublicationIndex%2Fdocuments%2Fdetails%3FPub%3DHA%26DocID%3D328815&rfr_id=info%3Asid%2Fen.wikipedia.org%3A2%2B1+road" class="Z3988"></span></span> </li> <li id="cite_note-11"><span class="mw-cite-backlink"><b><a href="#cite_ref-11">^</a></b></span> <span class="reference-text"><a href="/wiki/File:State_route_77_in_the_salt_river_canyon,_arizona.jpg" title="File:State route 77 in the salt river canyon, arizona.jpg">en:File:State route 77 in the salt river canyon, arizona.jpg</a></span> </li> <li id="cite_note-12"><span class="mw-cite-backlink"><b><a href="#cite_ref-12">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://onlinemanuals.txdot.gov/txdotmanuals/rdw/super_2_highways.htm">"Roadway Design Manual: Super 2 Highways"</a>. <i>onlinemanuals.txdot.gov</i>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=onlinemanuals.txdot.gov&rft.atitle=Roadway+Design+Manual%3A+Super+2+Highways&rft_id=http%3A%2F%2Fonlinemanuals.txdot.gov%2Ftxdotmanuals%2Frdw%2Fsuper_2_highways.htm&rfr_id=info%3Asid%2Fen.wikipedia.org%3A2%2B1+road" class="Z3988"></span></span> </li> <li id="cite_note-13"><span class="mw-cite-backlink"><b><a href="#cite_ref-13">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://www.ishgd2015.net/s/72-Performance-Evaluation-of-21-Lane-Highway-in-Hokkaido-Japan.pdf">Kazunori Munehiro (2015), Performance Evaluation of 2+1 Lane Highway in Hokkaido, Japan: Case Study of Saraki-tomanai Road</a><sup class="noprint Inline-Template"><span style="white-space: nowrap;">[<i><a href="/wiki/Wikipedia:Link_rot" title="Wikipedia:Link rot"><span title=" Dead link tagged June 2022">permanent dead link</span></a></i><span style="visibility:hidden; color:transparent; padding-left:2px">‍</span>]</span></sup>, 5th International Symposium on Highway Geometric Design, Vancouver, Canada.</span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=2%2B1_road&action=edit&section=18" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1235681985">.mw-parser-output .side-box{margin:4px 0;box-sizing:border-box;border:1px solid #aaa;font-size:88%;line-height:1.25em;background-color:var(--background-color-interactive-subtle,#f8f9fa);display:flow-root}.mw-parser-output .side-box-abovebelow,.mw-parser-output .side-box-text{padding:0.25em 0.9em}.mw-parser-output .side-box-image{padding:2px 0 2px 0.9em;text-align:center}.mw-parser-output .side-box-imageright{padding:2px 0.9em 2px 0;text-align:center}@media(min-width:500px){.mw-parser-output .side-box-flex{display:flex;align-items:center}.mw-parser-output .side-box-text{flex:1;min-width:0}}@media(min-width:720px){.mw-parser-output .side-box{width:238px}.mw-parser-output .side-box-right{clear:right;float:right;margin-left:1em}.mw-parser-output .side-box-left{margin-right:1em}}</style><style data-mw-deduplicate="TemplateStyles:r1237033735">@media print{body.ns-0 .mw-parser-output .sistersitebox{display:none!important}}@media screen{html.skin-theme-clientpref-night .mw-parser-output .sistersitebox img[src*="Wiktionary-logo-en-v2.svg"]{background-color:white}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .sistersitebox img[src*="Wiktionary-logo-en-v2.svg"]{background-color:white}}</style><div class="side-box side-box-right plainlinks sistersitebox"><style data-mw-deduplicate="TemplateStyles:r1126788409">.mw-parser-output .plainlist ol,.mw-parser-output .plainlist ul{line-height:inherit;list-style:none;margin:0;padding:0}.mw-parser-output .plainlist ol li,.mw-parser-output .plainlist ul li{margin-bottom:0}</style> <div class="side-box-flex"> <div class="side-box-image"><span class="noviewer" typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png" decoding="async" width="30" height="40" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/45px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/59px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></span></span></div> <div class="side-box-text plainlist">Wikimedia Commons has media related to <span style="font-weight: bold; font-style: italic;"><a href="https://commons.wikimedia.org/wiki/Category:2%2B1_road" class="extiw" title="commons:Category:2+1 road">2+1 road</a></span>.</div></div> </div> <ul><li>Irish <a rel="nofollow" class="external text" href="https://web.archive.org/web/20061205013200/http://nra.ie/">National Roads Authority</a>: <ul><li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20070306211952/http://www.nra.ie/PublicationsResources/DownloadableDocumentation/RoadDesignConstruction/file,1317,en.pdf">Interim Advice Note on Road Link Design for 2+1 roads</a> (<a href="/wiki/PDF" title="PDF">PDF</a> 4.7 MB)</li> <li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20080213025720/http://www.nra.ie/mapping/">Major Road Schemes in Ireland 2008 update</a></li></ul></li> <li><a rel="nofollow" class="external text" href="http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_rrd_275.pdf">NCHRP Research Synthesis #275 on 2+1 Roadway Design Standards</a></li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output .hlist ol dl,.mw-parser-output .hlist ol ol,.mw-parser-output .hlist ol ul,.mw-parser-output .hlist ul dl,.mw-parser-output .hlist ul ol,.mw-parser-output .hlist ul ul{display:inline}.mw-parser-output .hlist .mw-empty-li{display:none}.mw-parser-output .hlist dt::after{content:": "}.mw-parser-output .hlist dd::after,.mw-parser-output .hlist li::after{content:" · ";font-weight:bold}.mw-parser-output .hlist dd:last-child::after,.mw-parser-output .hlist dt:last-child::after,.mw-parser-output .hlist li:last-child::after{content:none}.mw-parser-output .hlist dd dd:first-child::before,.mw-parser-output .hlist dd dt:first-child::before,.mw-parser-output .hlist dd li:first-child::before,.mw-parser-output .hlist dt dd:first-child::before,.mw-parser-output .hlist dt dt:first-child::before,.mw-parser-output .hlist dt li:first-child::before,.mw-parser-output .hlist li dd:first-child::before,.mw-parser-output .hlist li dt:first-child::before,.mw-parser-output .hlist li li:first-child::before{content:" (";font-weight:normal}.mw-parser-output .hlist dd dd:last-child::after,.mw-parser-output .hlist dd dt:last-child::after,.mw-parser-output .hlist dd li:last-child::after,.mw-parser-output .hlist dt dd:last-child::after,.mw-parser-output .hlist dt dt:last-child::after,.mw-parser-output .hlist dt li:last-child::after,.mw-parser-output .hlist li dd:last-child::after,.mw-parser-output .hlist li dt:last-child::after,.mw-parser-output .hlist li li:last-child::after{content:")";font-weight:normal}.mw-parser-output .hlist ol{counter-reset:listitem}.mw-parser-output .hlist ol>li{counter-increment:listitem}.mw-parser-output .hlist ol>li::before{content:" "counter(listitem)"\a0 "}.mw-parser-output .hlist dd ol>li:first-child::before,.mw-parser-output .hlist dt ol>li:first-child::before,.mw-parser-output .hlist li ol>li:first-child::before{content:" ("counter(listitem)"\a0 "}</style><style data-mw-deduplicate="TemplateStyles:r1236075235">.mw-parser-output .navbox{box-sizing:border-box;border:1px solid #a2a9b1;width:100%;clear:both;font-size:88%;text-align:center;padding:1px;margin:1em auto 0}.mw-parser-output .navbox .navbox{margin-top:0}.mw-parser-output .navbox+.navbox,.mw-parser-output .navbox+.navbox-styles+.navbox{margin-top:-1px}.mw-parser-output .navbox-inner,.mw-parser-output .navbox-subgroup{width:100%}.mw-parser-output .navbox-group,.mw-parser-output .navbox-title,.mw-parser-output .navbox-abovebelow{padding:0.25em 1em;line-height:1.5em;text-align:center}.mw-parser-output .navbox-group{white-space:nowrap;text-align:right}.mw-parser-output .navbox,.mw-parser-output .navbox-subgroup{background-color:#fdfdfd}.mw-parser-output .navbox-list{line-height:1.5em;border-color:#fdfdfd}.mw-parser-output .navbox-list-with-group{text-align:left;border-left-width:2px;border-left-style:solid}.mw-parser-output tr+tr>.navbox-abovebelow,.mw-parser-output tr+tr>.navbox-group,.mw-parser-output tr+tr>.navbox-image,.mw-parser-output tr+tr>.navbox-list{border-top:2px solid #fdfdfd}.mw-parser-output .navbox-title{background-color:#ccf}.mw-parser-output .navbox-abovebelow,.mw-parser-output .navbox-group,.mw-parser-output .navbox-subgroup .navbox-title{background-color:#ddf}.mw-parser-output .navbox-subgroup .navbox-group,.mw-parser-output .navbox-subgroup .navbox-abovebelow{background-color:#e6e6ff}.mw-parser-output .navbox-even{background-color:#f7f7f7}.mw-parser-output .navbox-odd{background-color:transparent}.mw-parser-output .navbox .hlist td dl,.mw-parser-output .navbox .hlist td ol,.mw-parser-output .navbox .hlist td ul,.mw-parser-output .navbox td.hlist dl,.mw-parser-output .navbox td.hlist ol,.mw-parser-output .navbox td.hlist ul{padding:0.125em 0}.mw-parser-output .navbox .navbar{display:block;font-size:100%}.mw-parser-output .navbox-title .navbar{float:left;text-align:left;margin-right:0.5em}body.skin--responsive .mw-parser-output .navbox-image img{max-width:none!important}@media print{body.ns-0 .mw-parser-output .navbox{display:none!important}}</style></div><div role="navigation" class="navbox" aria-labelledby="Road_hierarchy" style="padding:3px"><table class="nowraplinks hlist mw-collapsible mw-collapsed navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><style data-mw-deduplicate="TemplateStyles:r1239400231">.mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 7em}.mw-parser-output .navbar-ct-mini{font-size:114%;margin:0 4em}html.skin-theme-clientpref-night .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Road_types" title="Template:Road types"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Road_types" title="Template talk:Road types"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Road_types" title="Special:EditPage/Template:Road types"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Road_hierarchy" style="font-size:114%;margin:0 4em"><a href="/wiki/Road" title="Road">Road</a> <a href="/wiki/Road_hierarchy" title="Road hierarchy">hierarchy</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Types_of_road" title="Types of road">Types of road</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Limited-access_road" title="Limited-access road">Limited-access</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Bicycle_highway" title="Bicycle highway">Bicycle highway</a></li> <li><a href="/wiki/Controlled-access_highway" title="Controlled-access highway">Freeway / Motorway</a></li> <li><a href="/wiki/Dual_carriageway" title="Dual carriageway">Dual carriageway / Divided highway / Expressway</a></li> <li><a href="/wiki/Elevated_highway" title="Elevated highway">Elevated highway</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Category:Limited-access_roads_by_country" title="Category:Limited-access roads by country">By country</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Highways_in_Australia" title="Highways in Australia">Australia</a></li> <li><a href="/wiki/Transport_in_Belgium#Road_transport" title="Transport in Belgium">Belgium</a></li> <li><a href="/wiki/Brazilian_Highway_System" title="Brazilian Highway System">Brazil</a></li> <li><a href="/wiki/Roads_in_Canada" title="Roads in Canada">Canada</a></li> <li><a href="/wiki/Expressways_of_China" title="Expressways of China">China</a></li> <li><a href="/wiki/Highways_in_Croatia" title="Highways in Croatia">Croatia</a></li> <li><a href="/wiki/Highways_in_the_Czech_Republic" title="Highways in the Czech Republic">Czech Republic</a></li> <li><a href="/wiki/Autobahn" title="Autobahn">Germany</a></li> <li><a href="/wiki/Highways_in_Greece" title="Highways in Greece">Greece</a></li> <li><a href="/wiki/List_of_streets_and_roads_in_Hong_Kong" title="List of streets and roads in Hong Kong">Hong Kong</a></li> <li><a href="/wiki/Roads_in_India" title="Roads in India">India</a></li> <li><a href="/wiki/High-quality_dual_carriageway" title="High-quality dual carriageway">Ireland</a></li> <li><a href="/wiki/Roads_in_Italy" title="Roads in Italy">Italy</a></li> <li><a href="/wiki/List_of_roads_in_Nepal" title="List of roads in Nepal">Nepal</a></li> <li><a href="/wiki/Roads_in_Pakistan" title="Roads in Pakistan">Pakistan</a></li> <li><a href="/wiki/Highways_in_Poland" title="Highways in Poland">Poland</a></li> <li><a href="/wiki/Roads_in_Portugal" title="Roads in Portugal">Portugal</a></li> <li><a href="/wiki/Highways_in_Spain" title="Highways in Spain">Spain</a></li> <li><a href="/wiki/Highway_system_in_Taiwan" title="Highway system in Taiwan">Taiwan</a></li> <li><a href="/wiki/Roads_in_the_United_Kingdom" title="Roads in the United Kingdom">United Kingdom</a></li> <li><a href="/wiki/Numbered_highways_in_the_United_States" title="Numbered highways in the United States">United States</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Main roads</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Arterial_road" title="Arterial road">Arterial road</a></li> <li><a href="/wiki/Collector_road" title="Collector road">Collector road</a></li> <li><a href="/wiki/County_highway" title="County highway">County highway</a></li> <li><a href="/wiki/Local%E2%80%93express_lanes" title="Local–express lanes">Express–collector setup</a></li> <li><a href="/wiki/Farm-to-market_road" title="Farm-to-market road">Farm-to-market road</a></li> <li><a href="/wiki/Highway" title="Highway">Highway</a></li> <li><a href="/wiki/Link_road" title="Link road">Link road</a></li> <li><a href="/wiki/Two-lane_expressway" title="Two-lane expressway">Two-lane expressway</a></li> <li><a class="mw-selflink selflink">2+1 road</a></li> <li><a href="/wiki/2%2B2_road" title="2+2 road">2+2 road</a></li> <li><a href="/wiki/Parkway" title="Parkway">Parkway</a></li> <li><a href="/wiki/Ring_road" title="Ring road">Ring road</a></li> <li><a href="/wiki/Super_two" title="Super two">Super two</a></li> <li><a href="/wiki/Trunk_road" title="Trunk road">Trunk road</a></li> <li><a href="/wiki/Highway_systems_by_country" title="Highway systems by country">Highway systems by country</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Local roads</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li>Alley</li> <li><a href="/wiki/Avenue_(landscape)" title="Avenue (landscape)">Avenue</a></li> <li><a href="/wiki/Back_road" title="Back road">Back road</a></li> <li><a href="/wiki/Bicycle_boulevard" title="Bicycle boulevard">Bicycle boulevard</a></li> <li><a href="/wiki/Boulevard" title="Boulevard">Boulevard</a></li> <li><a href="/wiki/Country_lane" title="Country lane">Country lane</a></li> <li><a href="/wiki/Dead_end_street" title="Dead end street">Dead end</a></li> <li><a href="/wiki/Driveway" title="Driveway">Driveway</a></li> <li><a href="/wiki/Frontage_road" title="Frontage road">Frontage road</a></li> <li><a href="/wiki/Green_lane_(road)" title="Green lane (road)">Green lane</a></li> <li><a href="/wiki/Main_Street" title="Main Street">Main street</a></li> <li><a href="/wiki/Primitive_road" title="Primitive road">Primitive road</a></li> <li>Road</li> <li><a href="/wiki/Side_road" title="Side road">Side road</a></li> <li><a href="/wiki/Single_carriageway" title="Single carriageway">Single carriageway</a></li> <li><a href="/wiki/Single-track_road" title="Single-track road">Single-track road</a></li> <li>Street</li> <li><a href="/wiki/Sunken_lane" title="Sunken lane">Sunken lane</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other terms</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Concurrency_(road)" title="Concurrency (road)">Concurrency</a></li> <li><a href="/wiki/Detour" title="Detour">Detour</a></li> <li><a href="/wiki/Road_hierarchy" title="Road hierarchy">Road hierarchy</a></li> <li><a href="/wiki/Private_highway" title="Private highway">Private highway</a></li> <li><a href="/wiki/Route_number" title="Route number">Route number</a> <ul><li><a href="/wiki/Special_route" title="Special route">special route</a></li> <li><a href="/wiki/Business_route" title="Business route">business route</a></li></ul></li> <li><a href="/wiki/Street_hierarchy" title="Street hierarchy">Street hierarchy</a></li> <li><a href="/wiki/Stroad" title="Stroad">Stroad</a></li> <li><a href="/wiki/Toll_road" title="Toll road">Toll road</a></li> <li><a href="/wiki/Winter_road" title="Winter road">Winter road</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Road_junction" title="Road junction">Road junctions</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Interchange_(road)" title="Interchange (road)">Interchanges</a><br /><span class="nobold">(<a href="/wiki/Grade_separation" title="Grade separation">grade-separated</a>)</span></div></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Cloverleaf_interchange" title="Cloverleaf interchange">Cloverleaf</a></li> <li><a href="/wiki/Diamond_interchange" title="Diamond interchange">Diamond</a></li> <li><a href="/wiki/Free-flow_interchange" title="Free-flow interchange">Free-flow</a></li> <li><a href="/wiki/Interchange_(road)#Directional_T_interchange" title="Interchange (road)">Directional T</a></li> <li><a href="/wiki/Diverging_diamond_interchange" title="Diverging diamond interchange">Diverging diamond</a></li> <li><a href="/wiki/Partial_cloverleaf_interchange" title="Partial cloverleaf interchange">Parclo</a></li> <li><a href="/wiki/Raindrop_interchange" class="mw-redirect" title="Raindrop interchange">Raindrop</a></li> <li><a href="/wiki/Roundabout_interchange" title="Roundabout interchange">Roundabout</a></li> <li><a href="/wiki/Single-point_urban_interchange" title="Single-point urban interchange">Single-point urban (SPUI)</a></li> <li><a href="/wiki/Stack_interchange" title="Stack interchange">Stack</a></li> <li><a href="/wiki/Three-level_diamond_interchange" title="Three-level diamond interchange">Three-level diamond</a></li> <li><a href="/wiki/Interchange_(road)#Trumpet_interchange" title="Interchange (road)">Trumpet</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Intersection_(road)" title="Intersection (road)">Intersections<br /><span class="nobold">(at-grade)</span></a></div></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Three-way_junction" title="Three-way junction">3-way junction</a></li> <li><a href="/wiki/Bowtie_(road)" title="Bowtie (road)">Bowtie</a></li> <li><a href="/wiki/Box_junction" title="Box junction">Box junction</a></li> <li><a href="/wiki/Channelization_(roads)" title="Channelization (roads)">Channelization</a></li> <li><a href="/wiki/Continuous-flow_intersection" title="Continuous-flow intersection">Continuous flow</a></li> <li><a href="/wiki/Hook_turn" title="Hook turn">Hook turn</a></li> <li><a href="/wiki/Jughandle" title="Jughandle">Jughandle</a></li> <li><a href="/wiki/Michigan_left" title="Michigan left">Michigan left</a></li> <li><a href="/wiki/Offset_T-intersection" title="Offset T-intersection">Offset T-intersection</a></li> <li><a href="/wiki/Protected_intersection" title="Protected intersection">Protected intersection</a></li> <li><a href="/wiki/Quadrant_roadway_intersection" title="Quadrant roadway intersection">Quadrant roadway</a></li> <li><a href="/wiki/Right-in/right-out" title="Right-in/right-out">Right-in/right-out (RIRO)</a></li> <li><a href="/wiki/Roundabout" title="Roundabout">Roundabout</a></li> <li><a href="/wiki/Seagull_intersection" title="Seagull intersection">Seagull intersection</a></li> <li><a href="/wiki/Split_intersection" title="Split intersection">Split intersection</a></li> <li><a href="/wiki/Superstreet" title="Superstreet">Superstreet</a></li> <li><a href="/wiki/Texas_U-turn" title="Texas U-turn">Texas U-turn</a></li> <li><a href="/wiki/Turnaround_(road)" title="Turnaround (road)">Turnaround</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Road_surface" title="Road surface">Surfaces</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Asphalt_concrete" title="Asphalt concrete">Asphalt concrete</a></li> <li><a href="/wiki/Bioasphalt" title="Bioasphalt">Bioasphalt</a></li> <li>Brick</li> <li><a href="/wiki/Chipseal" title="Chipseal">Chipseal</a></li> <li><a href="/wiki/Cobblestone" title="Cobblestone">Cobblestone</a></li> <li><a href="/wiki/Concrete#Roads" title="Concrete">Concrete</a> <ul><li><a href="/wiki/Reinforced_concrete" title="Reinforced concrete">Reinforced concrete</a></li></ul></li> <li><a href="/wiki/Corduroy_road" title="Corduroy road">Corduroy</a></li> <li><a href="/wiki/Crocodile_cracking" title="Crocodile cracking">Crocodile cracking</a></li> <li><a href="/wiki/Crushed_stone" title="Crushed stone">Crushed stone</a></li> <li><a href="/wiki/Diamond_grinding_of_pavement" title="Diamond grinding of pavement">Diamond grinding of pavement</a></li> <li><a href="/wiki/Dirt_road" title="Dirt road">Dirt</a></li> <li><a href="/wiki/Full_depth_recycling" title="Full depth recycling">Full depth recycling</a></li> <li><a href="/wiki/Glassphalt" title="Glassphalt">Glassphalt</a></li> <li><a href="/wiki/Gravel_road" title="Gravel road">Gravel</a></li> <li><a href="/wiki/Ice_road" title="Ice road">Ice</a></li> <li><a href="/wiki/Macadam" title="Macadam">Macadam</a></li> <li><a href="/wiki/Pavement_milling" title="Pavement milling">Pavement milling</a></li> <li><a href="/wiki/Permeable_paving" title="Permeable paving">Permeable</a></li> <li><a href="/wiki/Plank_road" title="Plank road">Plank</a></li> <li><a href="/wiki/Plastic_road" title="Plastic road">Plastic</a></li> <li><a href="/wiki/Rubberized_asphalt" title="Rubberized asphalt">Rubberized asphalt</a></li> <li><a href="/wiki/Sealcoat" title="Sealcoat">Sealcoat</a></li> <li><a href="/wiki/Sett_(paving)" title="Sett (paving)">Sett</a></li> <li><a href="/wiki/Stamped_asphalt" title="Stamped asphalt">Stamped asphalt</a></li> <li><a href="/wiki/Tarmacadam" title="Tarmacadam">Tarmac</a></li> <li><a href="/wiki/Road_texture" title="Road texture">Texture</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Road_traffic_safety" title="Road traffic safety">Road safety<br />factors</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Road and<br />environment</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Aquaplaning" title="Aquaplaning">Aquaplaning</a></li> <li><a href="/wiki/Avalanche" title="Avalanche">Avalanche</a></li> <li><a href="/wiki/Black_ice" title="Black ice">Black ice</a></li> <li><a href="/wiki/Bleeding_(roads)" title="Bleeding (roads)">Bleeding</a></li> <li><a href="/wiki/Crosswind" title="Crosswind">Crosswind</a></li> <li><a href="/wiki/Dead_Man%27s_Curve" title="Dead Man's Curve">Dead Man's Curve</a></li> <li><a href="/wiki/Expansion_joint" title="Expansion joint">Expansion joint</a></li> <li><a href="/wiki/Fog" title="Fog">Fog</a></li> <li><a href="/wiki/Ford_(crossing)" title="Ford (crossing)">Ford</a></li> <li><a href="/wiki/Hairpin_turn" title="Hairpin turn">Hairpin turn</a></li> <li><a href="/wiki/Level_crossing" title="Level crossing">Level crossing</a></li> <li><a href="/wiki/Manhole_cover" title="Manhole cover">Manhole cover</a></li> <li><a href="/wiki/Oil_spill" title="Oil spill">Oil spill</a></li> <li><a href="/wiki/Oversize_load" title="Oversize load">Oversize load</a></li> <li><a href="/wiki/Pothole" title="Pothole">Pothole</a></li> <li><a href="/wiki/Road_debris" title="Road debris">Road debris</a></li> <li><a href="/wiki/Road_slipperiness" title="Road slipperiness">Road slipperiness</a></li> <li><a href="/wiki/Road_train" title="Road train">Road train</a></li> <li><a href="/wiki/Roadkill" title="Roadkill">Roadkill</a></li> <li><a href="/wiki/Rockfall" title="Rockfall">Rockfall</a></li> <li><a href="/wiki/Rut_(roads)" title="Rut (roads)">Rut</a></li> <li><a href="/wiki/Speed_bump" title="Speed bump">Speed bump</a></li> <li><a href="/wiki/Storm_drain" title="Storm drain">Storm drain</a></li> <li><a href="/wiki/Traffic_light" title="Traffic light">Traffic light</a></li> <li><a href="/wiki/Traffic_sign" title="Traffic sign">Traffic sign</a></li> <li><a href="/wiki/Washboarding" title="Washboarding">Washboarding</a></li> <li><a href="/wiki/Washout_(erosion)" title="Washout (erosion)">Washout</a></li> <li><a href="/wiki/Whiteout_(weather)" title="Whiteout (weather)">Whiteout</a></li> <li><a href="/wiki/Snow_squall" title="Snow squall">Snow squall</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Traffic_psychology" title="Traffic psychology">Human factors</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Driver%27s_education" title="Driver's education">Driver's education</a></li> <li><a href="/wiki/Driving_under_the_influence" title="Driving under the influence">Driving under the influence</a></li> <li><a href="/wiki/Drowsy_driving" title="Drowsy driving">Drowsy driving</a></li> <li><a href="/wiki/Road_rage" title="Road rage">Road rage</a></li> <li><a href="/wiki/Single-vehicle_crash" class="mw-redirect" title="Single-vehicle crash">Single-vehicle crash</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Vehicles</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Airbag" title="Airbag">Airbag</a></li> <li><a href="/wiki/Automotive_safety" title="Automotive safety">Automotive safety</a></li> <li><a href="/wiki/Seat_belt" title="Seat belt">Seat belt</a></li> <li><a href="/wiki/Risk_compensation#Road_transport" title="Risk compensation">Risk compensation (road transport)</a></li> <li><a href="/wiki/Underride_guard" class="mw-redirect" title="Underride guard">Underride guard</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Traffic#Rules_of_the_road" title="Traffic">Space and<br />time allocation</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Barrier_transfer_machine" title="Barrier transfer machine">Barrier transfer machine</a></li> <li><a href="/wiki/Bike_lane" title="Bike lane">Bike lane</a></li> <li><a href="/wiki/Climbing_lane" title="Climbing lane">Climbing lane</a></li> <li><a href="/wiki/Complete_streets" title="Complete streets">Complete streets</a></li> <li><a href="/wiki/Contraflow_lane" title="Contraflow lane">Contraflow lane</a></li> <li><a href="/wiki/Contraflow_lane_reversal" title="Contraflow lane reversal">Contraflow lane reversal</a></li> <li><a href="/wiki/High-occupancy_toll_lane" title="High-occupancy toll lane">High-occupancy toll lane</a></li> <li><a href="/wiki/High-occupancy_vehicle_lane" title="High-occupancy vehicle lane">High-occupancy vehicle lane</a></li> <li>Lane</li> <li><a href="/wiki/Living_street" title="Living street">Living street</a></li> <li><a href="/wiki/Managed_lane" title="Managed lane">Managed lane</a></li> <li><a href="/wiki/Median_strip" title="Median strip">Median / Central reservation</a></li> <li><a href="/wiki/Motorcycle_lane" title="Motorcycle lane">Motorcycle lane</a></li> <li><a href="/wiki/Passing_lane" title="Passing lane">Passing lane</a></li> <li><a href="/wiki/Pedestrian_crossing" title="Pedestrian crossing">Pedestrian crossing</a></li> <li><a href="/wiki/Pedestrian_zone" title="Pedestrian zone">Pedestrian zone</a></li> <li><a href="/wiki/Refuge_island" title="Refuge island">Refuge island</a></li> <li><a href="/wiki/Reversible_lane" title="Reversible lane">Reversible lane</a></li> <li><a href="/wiki/Road_diet" title="Road diet">Road diet</a></li> <li><a href="/wiki/Road_verge" title="Road verge">Road verge</a></li> <li><a href="/wiki/Runaway_truck_ramp" title="Runaway truck ramp">Runaway truck ramp</a></li> <li><a href="/wiki/Shared_space" title="Shared space">Shared space</a></li> <li><a href="/wiki/Sidewalk" title="Sidewalk">Sidewalk / Pavement</a></li> <li><a href="/wiki/Shoulder_(road)" title="Shoulder (road)">Shoulder</a></li> <li><a href="/wiki/Street_running_train" title="Street running train">Street-running railway</a></li> <li><a href="/wiki/Traffic_calming" title="Traffic calming">Traffic calming</a></li> <li><a href="/wiki/Left-_and_right-hand_traffic" title="Left- and right-hand traffic">Traffic directionality</a></li> <li><a href="/wiki/Traffic_island" title="Traffic island">Traffic island</a></li> <li><a href="/wiki/Traffic_lanes" class="mw-redirect" title="Traffic lanes">Traffic lanes</a></li> <li><a href="/wiki/Traffic_signal_preemption" title="Traffic signal preemption">Traffic signal preemption</a></li> <li><a href="/wiki/Truck_bypass" title="Truck bypass">Truck bypass</a></li> <li><a href="/wiki/Unused_highway" title="Unused highway">Unused highway</a></li> <li><a href="/wiki/Wide_outside_lane" title="Wide outside lane">Wide outside lane</a></li> <li><a href="/wiki/Woonerf" title="Woonerf">Woonerf</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Demarcation</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Bollard" title="Bollard">Bollard</a></li> <li><a href="/wiki/Botts%27_dots" title="Botts' dots">Botts' dots</a></li> <li><a href="/wiki/Cable_barrier" title="Cable barrier">Cable barrier</a></li> <li><a href="/wiki/Cat%27s_eye_(road)" title="Cat's eye (road)">Cat's eye (road)</a></li> <li><a href="/wiki/Concrete_step_barrier" title="Concrete step barrier">Concrete step barrier</a></li> <li><a href="/wiki/Constant-slope_barrier" title="Constant-slope barrier">Constant-slope barrier</a></li> <li>Curb</li> <li><a href="/wiki/F-shape_barrier" title="F-shape barrier">F-shape barrier</a></li> <li><a href="/wiki/Guard_rail" title="Guard rail">Guard rail</a></li> <li><a href="/wiki/Jersey_barrier" title="Jersey barrier">Jersey barrier</a></li> <li><a href="/wiki/Kassel_kerb" title="Kassel kerb">Kassel kerb</a></li> <li><a href="/wiki/Noise_barrier" title="Noise barrier">Noise barrier</a></li> <li><a href="/wiki/Raised_pavement_marker" title="Raised pavement marker">Raised pavement marker</a></li> <li><a href="/wiki/Road_surface_marking" title="Road surface marking">Road surface marking</a></li> <li><a href="/wiki/Rumble_strip" title="Rumble strip">Rumble strip</a></li> <li><a href="/wiki/Traffic_barrier" title="Traffic barrier">Traffic barrier</a></li> <li><a href="/wiki/Traffic_cone" title="Traffic cone">Traffic cone</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Structures</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li>Bridge</li> <li><a href="/wiki/Causeway" title="Causeway">Causeway</a></li> <li><a href="/wiki/Overpass" title="Overpass">Overpass / Flyover</a></li> <li><a href="/wiki/Tunnel" title="Tunnel">Underpass / Tunnel</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Performance<br />indicators</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Pavement_condition_index" title="Pavement condition index">Pavement condition index</a></li> <li><a href="/wiki/International_roughness_index" title="International roughness index">International roughness index</a></li> <li><a href="/wiki/Present_serviceability_index" title="Present serviceability index">Present serviceability index</a></li> <li><a href="/wiki/Pavement_performance_modeling" title="Pavement performance modeling">Pavement performance modeling</a></li> <li><a href="/wiki/Granular_base_equivalency" title="Granular base equivalency">Granular base equivalency</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div> <ul><li><a href="/wiki/Glossary_of_road_transport_terms" title="Glossary of road transport terms">Glossary of road transport terms</a></li> <li><a href="/wiki/List_of_road_types_by_features" class="mw-redirect" title="List of road types by features">Road types by features</a></li></ul> </div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=2%2B1_road&oldid=1256504257">https://en.wikipedia.org/w/index.php?title=2%2B1_road&oldid=1256504257</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" title="Help:Category">Categories</a>: <ul><li><a href="/wiki/Category:Road_surface_markings" title="Category:Road surface markings">Road surface markings</a></li><li><a href="/wiki/Category:Types_of_roads" title="Category:Types of roads">Types of roads</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Hidden categories: <ul><li><a href="/wiki/Category:CS1_Estonian-language_sources_(et)" title="Category:CS1 Estonian-language sources (et)">CS1 Estonian-language sources (et)</a></li><li><a href="/wiki/Category:Webarchive_template_wayback_links" title="Category:Webarchive template wayback links">Webarchive template wayback links</a></li><li><a href="/wiki/Category:All_articles_with_dead_external_links" title="Category:All articles with dead external links">All articles with dead external links</a></li><li><a href="/wiki/Category:Articles_with_dead_external_links_from_September_2024" title="Category:Articles with dead external links from September 2024">Articles with dead external links from September 2024</a></li><li><a href="/wiki/Category:Articles_with_permanently_dead_external_links" title="Category:Articles with permanently dead external links">Articles with permanently dead external links</a></li><li><a href="/wiki/Category:Articles_with_dead_external_links_from_August_2019" title="Category:Articles with dead external links from August 2019">Articles with dead external links from August 2019</a></li><li><a href="/wiki/Category:Articles_with_dead_external_links_from_June_2022" title="Category:Articles with dead external links from June 2022">Articles with dead external links from June 2022</a></li><li><a href="/wiki/Category:Articles_with_short_description" title="Category:Articles with short description">Articles with short description</a></li><li><a href="/wiki/Category:Short_description_matches_Wikidata" title="Category:Short description matches Wikidata">Short description matches Wikidata</a></li><li><a href="/wiki/Category:Articles_needing_additional_references_from_January_2011" title="Category:Articles needing additional references from January 2011">Articles needing additional references from January 2011</a></li><li><a href="/wiki/Category:All_articles_needing_additional_references" title="Category:All articles needing additional references">All articles needing additional references</a></li><li><a href="/wiki/Category:All_articles_with_unsourced_statements" title="Category:All articles with unsourced statements">All articles with unsourced statements</a></li><li><a href="/wiki/Category:Articles_with_unsourced_statements_from_April_2019" title="Category:Articles with unsourced statements from April 2019">Articles with unsourced statements from April 2019</a></li><li><a href="/wiki/Category:Commons_category_link_from_Wikidata" title="Category:Commons category link from Wikidata">Commons category link from Wikidata</a></li><li><a href="/wiki/Category:Articles_containing_video_clips" title="Category:Articles containing video clips">Articles containing video clips</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> This page was last edited on 10 November 2024, at 06:48<span class="anonymous-show"> (UTC)</span>.</li> <li id="footer-info-copyright">Text is available under the <a href="/wiki/Wikipedia:Text_of_the_Creative_Commons_Attribution-ShareAlike_4.0_International_License" title="Wikipedia:Text of the Creative Commons Attribution-ShareAlike 4.0 International License">Creative Commons Attribution-ShareAlike 4.0 License</a>; additional terms may apply. By using this site, you agree to the <a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Terms_of_Use" class="extiw" title="foundation:Special:MyLanguage/Policy:Terms of Use">Terms of Use</a> and <a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Privacy_policy" class="extiw" title="foundation:Special:MyLanguage/Policy:Privacy policy">Privacy Policy</a>. Wikipedia® is a registered trademark of the <a rel="nofollow" class="external text" href="https://wikimediafoundation.org/">Wikimedia Foundation, Inc.</a>, a non-profit organization.</li> </ul> <ul id="footer-places"> <li id="footer-places-privacy"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Privacy_policy">Privacy policy</a></li> <li id="footer-places-about"><a href="/wiki/Wikipedia:About">About Wikipedia</a></li> <li id="footer-places-disclaimers"><a href="/wiki/Wikipedia:General_disclaimer">Disclaimers</a></li> <li id="footer-places-contact"><a href="//en.wikipedia.org/wiki/Wikipedia:Contact_us">Contact Wikipedia</a></li> <li id="footer-places-wm-codeofconduct"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Universal_Code_of_Conduct">Code of Conduct</a></li> <li id="footer-places-developers"><a href="https://developer.wikimedia.org">Developers</a></li> <li id="footer-places-statslink"><a href="https://stats.wikimedia.org/#/en.wikipedia.org">Statistics</a></li> <li id="footer-places-cookiestatement"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Cookie_statement">Cookie statement</a></li> <li id="footer-places-mobileview"><a href="//en.m.wikipedia.org/w/index.php?title=2%2B1_road&mobileaction=toggle_view_mobile" class="noprint stopMobileRedirectToggle">Mobile view</a></li> </ul> <ul id="footer-icons" class="noprint"> <li id="footer-copyrightico"><a href="https://wikimediafoundation.org/" class="cdx-button cdx-button--fake-button cdx-button--size-large cdx-button--fake-button--enabled"><img src="/static/images/footer/wikimedia-button.svg" width="84" height="29" alt="Wikimedia Foundation" loading="lazy"></a></li> <li id="footer-poweredbyico"><a href="https://www.mediawiki.org/" class="cdx-button cdx-button--fake-button cdx-button--size-large cdx-button--fake-button--enabled"><img src="/w/resources/assets/poweredby_mediawiki.svg" alt="Powered by MediaWiki" width="88" height="31" loading="lazy"></a></li> </ul> </footer> </div> </div> </div> <div class="vector-settings" id="p-dock-bottom"> <ul></ul> </div><script>(RLQ=window.RLQ||[]).push(function(){mw.config.set({"wgHostname":"mw-web.codfw.main-f69cdc8f6-bklvv","wgBackendResponseTime":183,"wgPageParseReport":{"limitreport":{"cputime":"0.518","walltime":"0.738","ppvisitednodes":{"value":2109,"limit":1000000},"postexpandincludesize":{"value":87948,"limit":2097152},"templateargumentsize":{"value":5320,"limit":2097152},"expansiondepth":{"value":17,"limit":100},"expensivefunctioncount":{"value":6,"limit":500},"unstrip-depth":{"value":1,"limit":20},"unstrip-size":{"value":43386,"limit":5000000},"entityaccesscount":{"value":0,"limit":400},"timingprofile":["100.00% 556.284 1 -total"," 28.89% 160.688 1 Template:Reflist"," 22.59% 125.676 4 Template:Navbox"," 19.94% 110.939 1 Template:Road_types"," 15.95% 88.723 1 Template:Short_description"," 14.40% 80.078 1 Template:Cite_news"," 11.42% 63.504 1 Template:Refimprove"," 10.42% 57.981 1 Template:Ambox"," 8.97% 49.902 1 Template:Commonscat"," 8.29% 46.124 1 Template:Sister_project"]},"scribunto":{"limitreport-timeusage":{"value":"0.298","limit":"10.000"},"limitreport-memusage":{"value":8721937,"limit":52428800}},"cachereport":{"origin":"mw-web.codfw.main-f69cdc8f6-zlb24","timestamp":"20241122162524","ttl":2592000,"transientcontent":false}}});});</script> <script type="application/ld+json">{"@context":"https:\/\/schema.org","@type":"Article","name":"2+1 road","url":"https:\/\/en.wikipedia.org\/wiki\/2%2B1_road","sameAs":"http:\/\/www.wikidata.org\/entity\/Q3048788","mainEntity":"http:\/\/www.wikidata.org\/entity\/Q3048788","author":{"@type":"Organization","name":"Contributors to Wikimedia projects"},"publisher":{"@type":"Organization","name":"Wikimedia Foundation, Inc.","logo":{"@type":"ImageObject","url":"https:\/\/www.wikimedia.org\/static\/images\/wmf-hor-googpub.png"}},"datePublished":"2006-01-07T20:39:16Z","dateModified":"2024-11-10T06:48:03Z","image":"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/1\/1d\/MMLNorr1.JPG","headline":"Design of road"}</script> </body> </html>