Service Alerts - General Transit Feed Specification

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</li> <li class="md-nav__item"> <a href="../../../../getting-started/validate/" class="md-nav__link"> <span class="md-ellipsis"> Validate </span> </a> </li> <li class="md-nav__item"> <a href="../../../../getting-started/publish/" class="md-nav__link"> <span class="md-ellipsis"> Publish </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_2_4" > <label class="md-nav__link" for="__nav_2_4" id="__nav_2_4_label" tabindex="0"> <span class="md-ellipsis"> What can GTFS do? </span> <span class="md-nav__icon md-icon"></span> </label> <nav class="md-nav" data-md-level="2" aria-labelledby="__nav_2_4_label" aria-expanded="false"> <label class="md-nav__title" for="__nav_2_4"> <span class="md-nav__icon md-icon"></span> What can GTFS do? </label> <ul class="md-nav__list" data-md-scrollfix> <li class="md-nav__item"> <a href="../../../../getting-started/features/overview/" class="md-nav__link"> <span class="md-ellipsis"> Overview </span> </a> </li> <li class="md-nav__item"> <a href="../../../../getting-started/features/base/" class="md-nav__link"> <span class="md-ellipsis"> Base </span> </a> </li> <li class="md-nav__item"> <a href="../../../../getting-started/features/base-add-ons/" class="md-nav__link"> <span class="md-ellipsis"> Base add-ons </span> </a> </li> <li class="md-nav__item"> <a href="../../../../getting-started/features/accessibility/" class="md-nav__link"> <span class="md-ellipsis"> Accessibility </span> </a> </li> <li class="md-nav__item"> <a href="../../../../getting-started/features/fares/" class="md-nav__link"> <span class="md-ellipsis"> Fares </span> </a> </li> <li class="md-nav__item"> <a href="../../../../getting-started/features/pathways/" class="md-nav__link"> <span class="md-ellipsis"> Pathways </span> </a> </li> <li class="md-nav__item"> <a href="../../../../getting-started/features/flexible-services/" class="md-nav__link"> <span class="md-ellipsis"> Flexible services </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item"> <a href="../../../../getting-started/example-feed/" class="md-nav__link"> <span class="md-ellipsis"> Example GTFS feed </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--active md-nav__item--section md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_3" checked> <label class="md-nav__link" for="__nav_3" id="__nav_3_label" tabindex=""> <span class="md-ellipsis"> Technical Documentation </span> <span class="md-nav__icon md-icon"></span> </label> <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_3_label" aria-expanded="true"> <label class="md-nav__title" for="__nav_3"> <span class="md-nav__icon md-icon"></span> Technical Documentation </label> <ul class="md-nav__list" data-md-scrollfix> <li class="md-nav__item"> <a href="../../../overview/" class="md-nav__link"> <span class="md-ellipsis"> Overview </span> </a> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_3_2" > <label class="md-nav__link" for="__nav_3_2" id="__nav_3_2_label" tabindex="0"> <span class="md-ellipsis"> Schedule </span> <span class="md-nav__icon md-icon"></span> </label> <nav class="md-nav" data-md-level="2" aria-labelledby="__nav_3_2_label" aria-expanded="false"> <label class="md-nav__title" for="__nav_3_2"> <span class="md-nav__icon md-icon"></span> Schedule </label> <ul class="md-nav__list" data-md-scrollfix> <li class="md-nav__item"> <a href="../../../schedule/reference/" class="md-nav__link"> <span class="md-ellipsis"> Reference </span> </a> </li> <li class="md-nav__item"> <a href="../../../schedule/schedule-best-practices/" class="md-nav__link"> <span class="md-ellipsis"> Best Practices </span> </a> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_3_2_3" > <label class="md-nav__link" for="__nav_3_2_3" id="__nav_3_2_3_label" tabindex="0"> <span class="md-ellipsis"> Data examples </span> <span class="md-nav__icon md-icon"></span> </label> <nav class="md-nav" data-md-level="3" aria-labelledby="__nav_3_2_3_label" aria-expanded="false"> <label class="md-nav__title" for="__nav_3_2_3"> <span class="md-nav__icon md-icon"></span> Data examples </label> <ul class="md-nav__list" data-md-scrollfix> <li class="md-nav__item"> <a href="../../../schedule/examples/attributions/" class="md-nav__link"> <span class="md-ellipsis"> Attributions </span> </a> </li> <li class="md-nav__item"> <a href="../../../schedule/examples/continuous-stops/" class="md-nav__link"> <span class="md-ellipsis"> Continuous stops </span> </a> </li> <li class="md-nav__item"> <a href="../../../schedule/examples/flex/" class="md-nav__link"> <span class="md-ellipsis"> Demand responsive services </span> </a> </li> <li class="md-nav__item"> <a href="../../../schedule/examples/fares-v1/" class="md-nav__link"> <span class="md-ellipsis"> Fares v1 </span> </a> </li> <li class="md-nav__item"> <a href="../../../schedule/examples/fares-v2/" class="md-nav__link"> <span class="md-ellipsis"> Fares v2 </span> </a> </li> <li class="md-nav__item"> <a href="../../../schedule/examples/feed-info/" class="md-nav__link"> <span class="md-ellipsis"> Feed information </span> </a> </li> <li class="md-nav__item"> <a href="../../../schedule/examples/frequencies/" class="md-nav__link"> <span class="md-ellipsis"> Frequencies </span> </a> </li> <li class="md-nav__item"> <a href="../../../schedule/examples/pathways/" class="md-nav__link"> <span class="md-ellipsis"> Pathways </span> </a> </li> <li class="md-nav__item"> <a href="../../../schedule/examples/routes-stops-trips/" class="md-nav__link"> <span class="md-ellipsis"> Routes, Stops & Trips </span> </a> </li> <li class="md-nav__item"> <a href="../../../schedule/examples/text-to-speech/" class="md-nav__link"> <span class="md-ellipsis"> Text-to-speech </span> </a> </li> <li class="md-nav__item"> <a href="../../../schedule/examples/transfers/" class="md-nav__link"> <span class="md-ellipsis"> Transfers </span> </a> </li> <li class="md-nav__item"> <a href="../../../schedule/examples/translations/" class="md-nav__link"> <span class="md-ellipsis"> Translations </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_3_2_4" > <label class="md-nav__link" for="__nav_3_2_4" id="__nav_3_2_4_label" tabindex="0"> <span class="md-ellipsis"> Change history </span> <span class="md-nav__icon md-icon"></span> </label> <nav class="md-nav" data-md-level="3" aria-labelledby="__nav_3_2_4_label" aria-expanded="false"> <label class="md-nav__title" for="__nav_3_2_4"> <span class="md-nav__icon md-icon"></span> Change history </label> <ul class="md-nav__list" data-md-scrollfix> <li class="md-nav__item"> <a href="../../../schedule/change-history/recent-additions/" class="md-nav__link"> <span class="md-ellipsis"> Recent additions </span> </a> </li> <li class="md-nav__item"> <a href="../../../schedule/change-history/revision-history/" class="md-nav__link"> <span class="md-ellipsis"> Full revision history </span> </a> </li> </ul> </nav> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--active md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_3_3" checked> <label class="md-nav__link" for="__nav_3_3" id="__nav_3_3_label" tabindex="0"> <span class="md-ellipsis"> Realtime </span> <span class="md-nav__icon md-icon"></span> </label> <nav class="md-nav" data-md-level="2" aria-labelledby="__nav_3_3_label" aria-expanded="true"> <label class="md-nav__title" for="__nav_3_3"> <span class="md-nav__icon md-icon"></span> Realtime </label> <ul class="md-nav__list" data-md-scrollfix> <li class="md-nav__item"> <a href="../../reference/" class="md-nav__link"> <span class="md-ellipsis"> Reference </span> </a> </li> <li class="md-nav__item"> <a href="../../realtime-best-practices/" class="md-nav__link"> <span class="md-ellipsis"> Best Practices </span> </a> </li> <li class="md-nav__item md-nav__item--active md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_3_3_3" checked> <label class="md-nav__link" for="__nav_3_3_3" id="__nav_3_3_3_label" tabindex="0"> <span class="md-ellipsis"> Feed Entities </span> <span class="md-nav__icon md-icon"></span> </label> <nav class="md-nav" data-md-level="3" aria-labelledby="__nav_3_3_3_label" aria-expanded="true"> <label class="md-nav__title" for="__nav_3_3_3"> <span class="md-nav__icon md-icon"></span> Feed Entities </label> <ul class="md-nav__list" data-md-scrollfix> <li class="md-nav__item"> <a href="../overview/" class="md-nav__link"> <span class="md-ellipsis"> Overview </span> </a> </li> <li class="md-nav__item"> <a href="../trip-updates/" class="md-nav__link"> <span class="md-ellipsis"> Trip Updates </span> </a> </li> <li class="md-nav__item md-nav__item--active"> <input class="md-nav__toggle md-toggle" type="checkbox" id="__toc"> <label class="md-nav__link md-nav__link--active" for="__toc"> <span class="md-ellipsis"> Service Alerts </span> <span class="md-nav__icon md-icon"></span> </label> <a href="./" class="md-nav__link md-nav__link--active"> <span class="md-ellipsis"> Service Alerts </span> </a> <nav class="md-nav md-nav--secondary" aria-label="Table of contents"> <label class="md-nav__title" for="__toc"> <span class="md-nav__icon md-icon"></span> Table of contents </label> <ul class="md-nav__list" data-md-component="toc" data-md-scrollfix> <li class="md-nav__item"> <a href="#timerange" class="md-nav__link"> <span class="md-ellipsis"> TimeRange </span> </a> </li> <li class="md-nav__item"> <a href="#entityselector" class="md-nav__link"> <span class="md-ellipsis"> EntitySelector </span> </a> </li> <li class="md-nav__item"> <a href="#cause" class="md-nav__link"> <span class="md-ellipsis"> Cause </span> </a> </li> <li class="md-nav__item"> <a href="#effect" class="md-nav__link"> <span class="md-ellipsis"> Effect </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item"> <a href="../vehicle-positions/" class="md-nav__link"> <span class="md-ellipsis"> Vehicle Positions </span> </a> </li> <li class="md-nav__item"> <a href="../trip-modifications/" class="md-nav__link"> <span class="md-ellipsis"> Trip Modifications </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item"> <a href="../../proto/" class="md-nav__link"> <span class="md-ellipsis"> Protobuf </span> </a> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_3_3_5" > <label class="md-nav__link" for="__nav_3_3_5" id="__nav_3_3_5_label" tabindex="0"> <span class="md-ellipsis"> Language Bindings </span> <span class="md-nav__icon md-icon"></span> </label> <nav class="md-nav" data-md-level="3" aria-labelledby="__nav_3_3_5_label" aria-expanded="false"> <label class="md-nav__title" for="__nav_3_3_5"> <span class="md-nav__icon md-icon"></span> Language Bindings </label> <ul class="md-nav__list" data-md-scrollfix> <li class="md-nav__item"> <a href="../../language-bindings/overview/" class="md-nav__link"> <span class="md-ellipsis"> Overview </span> </a> </li> <li class="md-nav__item"> <a href="../../language-bindings/dotnet/" class="md-nav__link"> <span class="md-ellipsis"> .NET </span> </a> </li> <li class="md-nav__item"> <a href="../../language-bindings/java/" class="md-nav__link"> <span class="md-ellipsis"> Java </span> </a> </li> <li class="md-nav__item"> <a href="../../language-bindings/nodejs/" class="md-nav__link"> <span class="md-ellipsis"> JavaScript/Node.js </span> </a> </li> <li class="md-nav__item"> <a href="../../language-bindings/python/" class="md-nav__link"> <span class="md-ellipsis"> Python </span> </a> </li> <li class="md-nav__item"> <a href="../../language-bindings/golang/" class="md-nav__link"> <span class="md-ellipsis"> Golang </span> </a> </li> <li class="md-nav__item"> <a href="../../language-bindings/ruby/" class="md-nav__link"> <span class="md-ellipsis"> Ruby </span> </a> </li> <li class="md-nav__item"> <a href="../../language-bindings/php/" class="md-nav__link"> <span class="md-ellipsis"> PHP </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_3_3_6" > <label class="md-nav__link" for="__nav_3_3_6" id="__nav_3_3_6_label" tabindex="0"> <span class="md-ellipsis"> Data examples </span> <span class="md-nav__icon md-icon"></span> </label> <nav class="md-nav" data-md-level="3" aria-labelledby="__nav_3_3_6_label" aria-expanded="false"> <label class="md-nav__title" for="__nav_3_3_6"> <span class="md-nav__icon md-icon"></span> Data examples </label> <ul class="md-nav__list" data-md-scrollfix> <li class="md-nav__item"> <a href="../../examples/service-alerts/" class="md-nav__link"> <span class="md-ellipsis"> Service alerts </span> </a> </li> <li class="md-nav__item"> <a href="../../examples/trip-updates/" class="md-nav__link"> <span class="md-ellipsis"> Trip updates </span> </a> </li> <li class="md-nav__item"> <a href="../../examples/migration-duplicated/" class="md-nav__link"> <span class="md-ellipsis"> Migration duplicated </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_3_3_7" > <label class="md-nav__link" for="__nav_3_3_7" id="__nav_3_3_7_label" tabindex="0"> <span class="md-ellipsis"> Change history </span> <span class="md-nav__icon md-icon"></span> </label> <nav class="md-nav" data-md-level="3" aria-labelledby="__nav_3_3_7_label" aria-expanded="false"> <label class="md-nav__title" for="__nav_3_3_7"> <span class="md-nav__icon md-icon"></span> Change history </label> <ul class="md-nav__list" data-md-scrollfix> <li class="md-nav__item"> <a href="../../change-history/recent-additions/" class="md-nav__link"> <span class="md-ellipsis"> Recent Additions </span> </a> </li> <li class="md-nav__item"> <a href="../../change-history/revision-history/" class="md-nav__link"> <span class="md-ellipsis"> Full revision history </span> </a> </li> </ul> </nav> </li> </ul> </nav> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_4" > <label class="md-nav__link" for="__nav_4" id="__nav_4_label" tabindex="0"> <span class="md-ellipsis"> Community </span> <span class="md-nav__icon md-icon"></span> </label> <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_4_label" aria-expanded="false"> <label class="md-nav__title" for="__nav_4"> <span class="md-nav__icon md-icon"></span> Community </label> <ul class="md-nav__list" data-md-scrollfix> <li class="md-nav__item"> <a href="../../../../community/get-involved/" class="md-nav__link"> <span class="md-ellipsis"> Get involved </span> </a> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_4_2" > <label class="md-nav__link" for="__nav_4_2" id="__nav_4_2_label" tabindex="0"> <span class="md-ellipsis"> Governance </span> <span class="md-nav__icon md-icon"></span> </label> <nav class="md-nav" data-md-level="2" aria-labelledby="__nav_4_2_label" aria-expanded="false"> <label class="md-nav__title" for="__nav_4_2"> <span class="md-nav__icon md-icon"></span> Governance </label> <ul class="md-nav__list" data-md-scrollfix> <li class="md-nav__item"> <a href="../../../../community/governance/gtfs-schedule-amendment-process/" class="md-nav__link"> <span class="md-ellipsis"> GTFS Schedule Amendment Process </span> </a> </li> <li class="md-nav__item"> <a href="../../../../community/governance/gtfs-realtime-amendment-process/" class="md-nav__link"> <span class="md-ellipsis"> GTFS Realtime Amendment Process </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_4_3" > <label class="md-nav__link" for="__nav_4_3" id="__nav_4_3_label" tabindex="0"> <span class="md-ellipsis"> Extensions </span> <span class="md-nav__icon md-icon"></span> </label> <nav class="md-nav" data-md-level="2" aria-labelledby="__nav_4_3_label" aria-expanded="false"> <label class="md-nav__title" for="__nav_4_3"> <span class="md-nav__icon md-icon"></span> Extensions </label> <ul class="md-nav__list" data-md-scrollfix> <li class="md-nav__item"> <a href="../../../../community/extensions/overview/" class="md-nav__link"> <span class="md-ellipsis"> Overview </span> </a> </li> <li class="md-nav__item"> <a href="../../../../community/extensions/fares-v2/" class="md-nav__link"> <span class="md-ellipsis"> Fares v2 </span> </a> </li> <li class="md-nav__item"> <a href="../../../../community/extensions/flex/" class="md-nav__link"> <span class="md-ellipsis"> Flex </span> </a> </li> </ul> </nav> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_5" > <label class="md-nav__link" for="__nav_5" id="__nav_5_label" tabindex="0"> <span class="md-ellipsis"> Resources </span> <span class="md-nav__icon md-icon"></span> </label> <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_5_label" aria-expanded="false"> <label class="md-nav__title" for="__nav_5"> <span class="md-nav__icon md-icon"></span> Resources </label> <ul class="md-nav__list" data-md-scrollfix> <li class="md-nav__item"> <a href="../../../../resources/overview/" class="md-nav__link"> <span class="md-ellipsis"> Overview </span> </a> </li> <li class="md-nav__item"> <a href="../../../../resources/getting-started/" class="md-nav__link"> <span class="md-ellipsis"> Getting Started </span> </a> </li> <li class="md-nav__item"> <a href="../../../../resources/community/" class="md-nav__link"> <span class="md-ellipsis"> Community </span> </a> </li> <li class="md-nav__item"> <a href="../../../../resources/data/" class="md-nav__link"> <span class="md-ellipsis"> Data </span> </a> </li> <li class="md-nav__item"> <a href="../../../../resources/software-for-creating-apis/" class="md-nav__link"> <span class="md-ellipsis"> Software for Creating APIs </span> </a> </li> <li class="md-nav__item"> <a href="../../../../resources/agency-tools/" class="md-nav__link"> <span class="md-ellipsis"> Agency Tools </span> </a> </li> <li class="md-nav__item"> <a href="../../../../resources/hardware/" class="md-nav__link"> <span class="md-ellipsis"> Hardware </span> </a> </li> <li class="md-nav__item"> <a href="../../../../resources/apps/" class="md-nav__link"> <span class="md-ellipsis"> Apps </span> </a> </li> <li class="md-nav__item"> <a href="../../../../resources/sdk/" class="md-nav__link"> <span class="md-ellipsis"> SDKs </span> </a> </li> <li class="md-nav__item"> <a href="../../../../resources/visualizations/" class="md-nav__link"> <span class="md-ellipsis"> Visualizations </span> </a> </li> <li class="md-nav__item"> <a href="../../../../resources/gtfs/" class="md-nav__link"> <span class="md-ellipsis"> GTFS </span> </a> </li> <li class="md-nav__item"> <a href="../../../../resources/gtfs-realtime/" class="md-nav__link"> <span class="md-ellipsis"> GTFS Realtime </span> </a> </li> <li class="md-nav__item"> <a href="../../../../resources/siri/" class="md-nav__link"> <span class="md-ellipsis"> SIRI </span> </a> </li> <li class="md-nav__item"> <a href="../../../../resources/multimodal/" class="md-nav__link"> <span class="md-ellipsis"> Multimodal </span> </a> </li> <li class="md-nav__item"> <a href="../../../../resources/other/" class="md-nav__link"> <span class="md-ellipsis"> Other </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_6" > <div class="md-nav__link md-nav__container"> <a href="../../../../about/" class="md-nav__link "> <span class="md-ellipsis"> About </span> </a> </div> <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_6_label" aria-expanded="false"> <label class="md-nav__title" for="__nav_6"> <span class="md-nav__icon md-icon"></span> About </label> <ul class="md-nav__list" data-md-scrollfix> </ul> </nav> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_7" > <div class="md-nav__link md-nav__container"> <a href="../../../../blog/" class="md-nav__link "> <span class="md-ellipsis"> Blog </span> </a> </div> <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_7_label" aria-expanded="false"> <label class="md-nav__title" for="__nav_7"> <span class="md-nav__icon md-icon"></span> Blog </label> <ul class="md-nav__list" data-md-scrollfix> </ul> </nav> </li> </ul> </nav> </div> </div> </div> <div class="md-sidebar md-sidebar--secondary" data-md-component="sidebar" data-md-type="toc" > <div class="md-sidebar__scrollwrap"> <div class="md-sidebar__inner"> <nav class="md-nav md-nav--secondary" aria-label="Table of contents"> <label class="md-nav__title" for="__toc"> <span class="md-nav__icon md-icon"></span> Table of contents </label> <ul class="md-nav__list" data-md-component="toc" data-md-scrollfix> <li class="md-nav__item"> <a href="#timerange" class="md-nav__link"> <span class="md-ellipsis"> TimeRange </span> </a> </li> <li class="md-nav__item"> <a href="#entityselector" class="md-nav__link"> <span class="md-ellipsis"> EntitySelector </span> </a> </li> <li class="md-nav__item"> <a href="#cause" class="md-nav__link"> <span class="md-ellipsis"> Cause </span> </a> </li> <li class="md-nav__item"> <a href="#effect" class="md-nav__link"> <span class="md-ellipsis"> Effect </span> </a> </li> </ul> </nav> </div> </div> </div> <div class="md-content" data-md-component="content"> <article class="md-content__inner md-typeset"> <h1 id="service-alerts">Service Alerts<a class="headerlink" href="#service-alerts" title="Permanent link">¶</a></h1> <p>Service alerts allow you to provide updates whenever there is disruption on the network. Delays and cancellations of individual trips should usually be communicated using <a href="../trip-updates">Trip updates</a>.</p> <p>You have the option to provide the following:</p> <ul> <li>URL - link to your site explaining more about the alert</li> <li>Header text - a summary of the alert</li> <li>Description - a full description of the alert, which will always be shown alongside the header (so should not repeat this information).</li> </ul> <h2 id="timerange">TimeRange<a class="headerlink" href="#timerange" title="Permanent link">¶</a></h2> <p>The alert will be displayed where appropriate within the given time range. This range should cover the entire time that the alert is useful for the passenger to see.</p> <p>If no time is given, we will display the alert for as long as it is in the feed. If multiple ranges are given, we will display during all of them.</p> <h2 id="entityselector">EntitySelector<a class="headerlink" href="#entityselector" title="Permanent link">¶</a></h2> <p>Entity selector allows you specify exactly which parts of the network this alert affects, so that we can display only the most appropriate alerts to the user. You may include multiple entity selectors for alerts which affect multiple entities.</p> <p>Entities are selected using their GTFS identifiers, and you can select any of the following:</p> <ul> <li>Agency - affects the whole network</li> <li>Route - affects the whole route</li> <li>Route type - affects any route of this type. e.g. all subways.</li> <li>Trip - affects a particular trip</li> <li>Stop - affects a particular stop</li> </ul> <p>You may include more than one of the fields listed above in one <code>informed_entity</code>. When multiple fields are included in one <code>informed_entity</code>, they should be interpreted as being joined by the <code>AND</code> logical operator. In other words, the alert should only be applied in a context that meets all of the fields provided in an <code>informed_entity</code>. For example, if <code>route_id: "1"</code> and <code>stop_id: "5"</code> are both included in one <code>informed_entity</code>, then the alert should apply only to route 1 at stop 5. It should NOT be applied to any other stop on route 1, and it should NOT be applied to any other route at stop 5.</p> <p>If you would like to represent an alert that affects more than one entity (e.g. an alert for both route 1 and stop 5) , you should add multiple <code>informed_entity</code> to your <code>alert</code>, with each of them applying to the affected entity (e.g. one <code>informed_entity</code> that includes route 1 and another <code>informed_entity</code> that includes stop 5).</p> <h2 id="cause">Cause<a class="headerlink" href="#cause" title="Permanent link">¶</a></h2> <p>What is the cause of this alert? You may specify one of the following:</p> <ul> <li>Unknown cause</li> <li>Other cause (not represented by any of these options)</li> <li>Technical problem</li> <li>Strike</li> <li>Demonstration</li> <li>Accident</li> <li>Holiday</li> <li>Weather</li> <li>Maintenance</li> <li>Construction</li> <li>Police activity</li> <li>Medical emergency</li> </ul> <h2 id="effect">Effect<a class="headerlink" href="#effect" title="Permanent link">¶</a></h2> <p>What effect does this problem have on the specified entity? You may specify one of the following:</p> <ul> <li>No service</li> <li>Reduced service</li> <li>Significant delays (insignificant delays should only be provided through <a href="../trip-updates">Trip updates</a>).</li> <li>Detour</li> <li>Additional service</li> <li>Modified service: Operations are different from what the rider would normally expect. An example is an alert that reminds riders of an upcoming holiday schedule that is different from normal service on that day of the week.</li> <li>Stop moved</li> <li>Other effect (not represented by any of these options)</li> <li>Unknown effect</li> <li>No effect: The alert provides information to riders but does not affect operations. Examples include advertising public meetings and soliciting feedback via surveys.</li> <li>Accessibility issue: The alert provides information about accessibility issues that affects step-free access. Examples include an out of service elevator or movable ramps.</li> </ul> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type="button" class="md-top md-icon" data-md-component="top" hidden> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class="md-footer"> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div 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