4-3,,,,
Passenger-Miles: 1990–2005,,,,
(Millions),,,,
Mode,1990,2000,2004,2005
Air,,,,
Air carrier,"345,873","516,129","557,893 ","583,689"
General aviation,"13,000","15,200",U,U
Highway,,,,
Passenger cars,"2,281,391","2,544,457","R2,685,827","2,670,145"
"Other 2-axle, 4-tire vehiclesa","999,754","1,467,664","R1,780,771","1,836,988"
Busesb,"121,398","160,919","R144,188","140,910"
Motorcycles,"12,424","11,516","R12,855","13,677"
Rail,,,,
   Transitc,"12,046","15,200","15,930","P16,118"
   Commuter,"7,082","9,402","9,719","P9,473"
   Intercity/Amtrakd,"6,057","5,498","5,511","5,381"
Other transite,841,"1,631","1,874","P2,485"
"a Includes vans, pickup trucks, sport utility vehicles, and other 2-axle, 4-tire motor vehicles that are not passenger cars.",,,,
"b Includes municipally owned transit and commercial, federal, and school buses.",,,,
c Includes light and heavy rail only.,,,,
d Fiscal year data.  Amtrak began operations in 1971.,,,,
"e Includes demand response, ferryboat, and other transit not specified; 1980 data include ferryboat and “other transit” only.",,,,
Key: P = preliminary; R = revised; U = unavailable.,,,,
"Sources: Various sources, as cited in U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, National Transportation Statistics, table 1-37, available at http://www.bts.gov as of September 2007.",,,,