Unofficial Extensions

Some GTFS data producers and consumers develop their own extensions that have not been officially adopted, but may serve internal or experimental purposes.

Find some unofficial GTFS extensions below.

Google

GTFS-Plus

GTFS-Ride

MBTA (Boston, US-MA)

MTC GTFS+ (San Francisco Bay Area, US-CA)

New York MTA (New York, US-NY)

TriMet (Portland, US-OR)