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Transit data and statistics
National Transit Database (NTD)
U.S. Department of Transportation, Federal Transit Administration
The National Transit Database is a repository of US transit agency data and statistics. It includes transit profiles, time series data on transit systems and safety, and ridership data.
TransitLand is a community supported data service that aggregates a number of different transit data feeds, such as agency GTFS feeds.
An extensive archive of public transit data for software developers, transit agencies and more. Browse and download official GTFS & GTFS-realtime feeds from around the world.
Transit Wiki - Publicly Accessible Transit Data
A collection of links to accessible public transportation data feeds.
BART Developer Program
Links to many SF BART resources for developers including an API, realtime GTFS, and geospatial data .
SFMTA GTFS Transit Data
The SFMTA (SF Muni) GTFS feed for stops and schedule.
AC Transit Data Resource Center
A collection of AC Transit's data resources including an API, GTFS, and geospatial data.