NOTES: Rail transit is the sum of commuter rail, heavy rail, and light rail. In several large urban areas, Amtrak and commuter rail stations are shared, thus a single station may be counted in both categories. Stations serving the Alaska Railroad are included in Rail transit. Rail transit data include service both directly operated and purchased.
SOURCES: Rail Transit: Federal Transit Administration, Amtrak: National Railroad Passenger Corporation (Amtrak) as cited in U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, National Transportation Statistics, table 1-7, available at http://www.bts.gov/publications/national_transportation_statistics/ as of December 2010.