Public Transit Ridership (TRANSIT)

Source: U.S. Bureau of Transportation Statistics  

Release: Transportation Services Index and Seasonally-Adjusted Transportation Data  

Units:  Thousands of Unlinked Trips, Not Seasonally Adjusted

Frequency:  Monthly

Notes:

This data is collected by the American Public Transportation Association (APTA) data (2000 through 2009) available here and U.S. Department of Transportation, Federal Transit Administration, National Transit Database (2010 to present) available here.