|Air carrier, domestic, scheduled service||Class I, intercity bus||Transit, all modes (unlinked)||Commuter rail||Amtrak, intercity rail|
KEY: U = Data are unavailable.
NOTES: Class I bus includes regular route intercity service. Air carrier average passenger fare is scheduled service passenger revenue divided by scheduled revenue enplanements for large certificated carriers, including both passenger boarding and a change in flight number for the same aircraft where the passenger may remain on board.
SOURCES: Air Carrier and Bus: Bureau of Transportation Statistics, Transit and Commuter Rail: American Public Transportation Association, Intercity Rail: Amtrak and Association of American Railroads as cited in U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, National Transportation Statistics, table 3-15a, available at http://www.bts.gov/publications/national_transportation_statistics as of January 2009.