Rail transit data for 2002 and beyond include both directly operated and purchased transportation. Prior to 2002, the data include directly operated service only. Stations for U.S. territories are excluded.
KEY: ADA = Americans with Disabilities Act of 1992; NA = not applicable; U = data are not available.
1996-2014: U.S. Department of Transportation, Federal Transit Administration, National Transit Database (Washington, DC: Annual Issues), table 21, available at http://www.ntdprogram.gov as of June 8, 2016.
2015-16: U.S. Department of Transportation, Federal Transit Administration, National Transit Database (Washington, DC: Annual Issues), Stations, available at https://www.transit.dot.gov/ntd/ntd-data as of Apr. 18, 2018.
