Introducing GTFS-realtime to exchange realtime transit updates

In August 2011, Google announced the public availability of the GTFS-realtime specification, an extension of the General Transit Feed Specification (GTFS) first published in 2006, which enables public transport agencies to provide real-time updates on their fleets through Google Maps and mobile applications. This new format allows for dynamic information such as Trip Updates, Service Alerts, and Vehicle Position updates, with each type of update provided in separate feeds that can be used independently. The specification uses Protocol Buffers for efficient data processing and bandwidth usage, and it was designed in collaboration with transit agencies and developers. The specification is under the Creative Commons Attribution 3.0 license, inviting discussion and potential changes from the community. Agencies like MBTA and TriMet have already made their GTFS-realtime feeds available, and others like BART and MTS are expected to follow, with the goal of enhancing the accuracy and timeliness of public transit information for users.

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