Bay Area Rapid Transit District (BART) worked with Google during the early deployment of both the General Transit Feed Specification (GTFS) and General Transit Feed Specification Realtime (GTFS-RT). In both cases BART deployed its implementations on the official release date, along with a select few other transit agencies around the globe. These feeds provide a static schedule feed (GTFS) and a real-time feed of deviations from schedule and alerts (GTFS-RT).

The Bay Area Rapid Transit District (BART) is a leader in the "Open Government" movement, and a big proponent of "open data". It was one of the first transit agencies to provide schedules in the General Transit Feed Specification (GTFS) format, and was providing some additional data in XML and RSS feeds. It wanted to expand this to allow developers wider access to all of the BART data, including trip planning, real-time service, station information, and much more.