Overview - General Transit Feed Specification

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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 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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 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"> Overview </span> <span class="md-nav__icon md-icon"></span> </label> <a href="./" class="md-nav__link md-nav__link--active"> <span class="md-ellipsis"> Overview </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="#trip-updates" class="md-nav__link"> <span class="md-ellipsis"> Trip Updates </span> </a> <nav class="md-nav" aria-label="Trip Updates"> <ul class="md-nav__list"> <li class="md-nav__item"> <a href="#bus-x-is-delayed-by-5-minutes" class="md-nav__link"> <span class="md-ellipsis"> "Bus X is delayed by 5 minutes" </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item"> <a href="#service-alerts" class="md-nav__link"> <span class="md-ellipsis"> Service Alerts </span> </a> <nav class="md-nav" aria-label="Service Alerts"> <ul class="md-nav__list"> <li class="md-nav__item"> <a href="#station-y-is-closed-due-to-construction" class="md-nav__link"> <span class="md-ellipsis"> "Station Y is closed due to construction" </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> <nav class="md-nav" aria-label="Vehicle Positions"> <ul class="md-nav__list"> <li class="md-nav__item"> <a href="#this-bus-is-at-position-x-at-time-y" class="md-nav__link"> <span class="md-ellipsis"> "This bus is at position X at time Y" </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item"> <a href="#trip-modifications" class="md-nav__link"> <span class="md-ellipsis"> Trip Modifications </span> </a> <nav class="md-nav" aria-label="Trip Modifications"> <ul class="md-nav__list"> <li class="md-nav__item"> <a href="#these-trips-are-affected-by-a-detour-on-certain-days" class="md-nav__link"> <span class="md-ellipsis"> "These trips are affected by a detour on certain days" </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item"> <a href="#historical-remark-on-feed-types" class="md-nav__link"> <span class="md-ellipsis"> Historical remark on feed types </span> </a> </li> </ul> </nav> </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"> <a href="../service-alerts/" class="md-nav__link"> <span class="md-ellipsis"> Service Alerts </span> </a> </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="#trip-updates" class="md-nav__link"> <span class="md-ellipsis"> Trip Updates </span> </a> <nav class="md-nav" aria-label="Trip Updates"> <ul class="md-nav__list"> <li class="md-nav__item"> <a href="#bus-x-is-delayed-by-5-minutes" class="md-nav__link"> <span class="md-ellipsis"> "Bus X is delayed by 5 minutes" </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item"> <a href="#service-alerts" class="md-nav__link"> <span class="md-ellipsis"> Service Alerts </span> </a> <nav class="md-nav" aria-label="Service Alerts"> <ul class="md-nav__list"> <li class="md-nav__item"> <a href="#station-y-is-closed-due-to-construction" class="md-nav__link"> <span class="md-ellipsis"> "Station Y is closed due to construction" </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> <nav class="md-nav" aria-label="Vehicle Positions"> <ul class="md-nav__list"> <li class="md-nav__item"> <a href="#this-bus-is-at-position-x-at-time-y" class="md-nav__link"> <span class="md-ellipsis"> "This bus is at position X at time Y" </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item"> <a href="#trip-modifications" class="md-nav__link"> <span class="md-ellipsis"> Trip Modifications </span> </a> <nav class="md-nav" aria-label="Trip Modifications"> <ul class="md-nav__list"> <li class="md-nav__item"> <a href="#these-trips-are-affected-by-a-detour-on-certain-days" class="md-nav__link"> <span class="md-ellipsis"> "These trips are affected by a detour on certain days" </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item"> <a href="#historical-remark-on-feed-types" class="md-nav__link"> <span class="md-ellipsis"> Historical remark on feed types </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="feed-entities">Feed Entities<a class="headerlink" href="#feed-entities" title="Permanent link">¶</a></h1> <p>GTFS Realtime supports four distinct types of realtime data, that can be combined witin a single realtime feed. Summaries are given below, with full documentation given in the relevant section.</p> <h2 id="trip-updates">Trip Updates<a class="headerlink" href="#trip-updates" title="Permanent link">¶</a></h2> <h4 id="bus-x-is-delayed-by-5-minutes">"Bus X is delayed by 5 minutes"<a class="headerlink" href="#bus-x-is-delayed-by-5-minutes" title="Permanent link">¶</a></h4> <p>Trip updates represent fluctuations in the timetable. We would expect to receive trip updates for all trips you have scheduled that are realtime-capable. These updates would give a predicted arrival or departure for stops along the route. Trip updates can also provide for more complex scenarios where trips are canceled, added to the schedule, or even re-routed.</p> <p><a href="../trip-updates">More about Trip Updates...</a></p> <h2 id="service-alerts">Service Alerts<a class="headerlink" href="#service-alerts" title="Permanent link">¶</a></h2> <h4 id="station-y-is-closed-due-to-construction">"Station Y is closed due to construction"<a class="headerlink" href="#station-y-is-closed-due-to-construction" title="Permanent link">¶</a></h4> <p>Service alerts represent higher level problems with a particular entity and are generally in the form of a textual description of the disruption.</p> <p>They could represent problems with:</p> <ul> <li>Stations</li> <li>Lines</li> <li>The whole network</li> <li>etc.</li> </ul> <p>A service alert will usually consist of some text which will describe the problem, and we also allow for URLs for more information as well as more structured information to help us understand who this service alert affects.</p> <p><a href="../service-alerts">More about Service Alerts...</a></p> <h2 id="vehicle-positions">Vehicle Positions<a class="headerlink" href="#vehicle-positions" title="Permanent link">¶</a></h2> <h4 id="this-bus-is-at-position-x-at-time-y">"This bus is at position X at time Y"<a class="headerlink" href="#this-bus-is-at-position-x-at-time-y" title="Permanent link">¶</a></h4> <p>Vehicle position represents a few basic pieces of information about a particular vehicle on the network.</p> <p>Most important are the latitude and longitude the vehicle is at, but we can also use data on current speed and odometer readings from the vehicle.</p> <p><a href="../vehicle-positions">More about Vehicle Position updates...</a></p> <h2 id="trip-modifications">Trip Modifications<a class="headerlink" href="#trip-modifications" title="Permanent link">¶</a></h2> <h4 id="these-trips-are-affected-by-a-detour-on-certain-days">"These trips are affected by a detour on certain days"<a class="headerlink" href="#these-trips-are-affected-by-a-detour-on-certain-days" title="Permanent link">¶</a></h4> <p>Trip modifications are used to describe detours which affect a set of trips. </p> <p>A trip modification can cancel certain stops, adjust the timing for trips, provide a new shape that trips will take and provide the location of temporary stops along the way.</p> <p><a href="../trip-modifications">More about Trip Modifications...</a></p> <h2 id="historical-remark-on-feed-types">Historical remark on feed types<a class="headerlink" href="#historical-remark-on-feed-types" title="Permanent link">¶</a></h2> <p>Early versions of GTFS Realtime Specification required each feed to only contain single type of entities. An example tool to convert from merged to the feed-per-type schema is located in the Bliksem Labs <a href="https://github.com/bliksemlabs/gtfsrt-examples/blob/master/split_by_entitytype.py" target="_blank" rel="noopener">gtfsrt-examples</a> GitHub repository.</p> </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 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