Table 10,,,,,
Vehicle-Miles,,,,,
(Millions),,,,,
Mode,1970,1980,1990,2000,2001
Air carriers ,"2,068","2,523","3,963","R5,664","5,550"
General aviation,"3,207","5,204","R4,548",aN,aN
Passenger cars,"916,700","1,111,596","R1,408,266","R1,600,287","1,619,422"
Motorcycles,"2,979","10,214","9,557","R10,469","9,529"
"Other 2-axle, 4-tire vehiclesb","123,286","290,935","574,571","R923,059","937,839"
Trucks:,,,,,
Single-unit,"27,081","39,813","51,901","R70,500","72,286"
Combination,"35,134","68,678","94,341","R135,020","135,400"
Busesc,"4,544","6,059","5,726","R7,590","6,986"
Raild:,,,,,
Transite,441,403,561,p648,U
Commuter,N,179,213,p271,U
Class 1 freight,"29,890","29,277","26,159","34,590",U
Intercity/Amtrakf,690,235,301,368,U
Other transitg,N,15,324,p833,U
"aThe Federal Aviation Administration has estimated vehicle-miles for general aviation aircraft through 1997, relying in part on hours-flown survey data. Vehicle-miles estimates for subsequent years are not yet available. b In July 1997, the USDOT, Federal Highway Administration, reassigned some vehicle-miles from “passenger car” to “other 2-axle, 4-tire.” c Includes municipally-owned transit, commercial, federal, and school buses. d Car-miles. e Includes light and heavy rail only. f Fiscal year data. Amtrak began operations in 1971. g Includes demand-responsive, ferry boat, and other transit not specified; 1980 data include “other transit” only.",,,,,
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Key: N = data do not exist; P = preliminary; R = revised.,,,,,
"Sources: Various sources, as cited in USDOT, Bureau of Transportation Statistics, National Transportation Statistics 2002 (Washington, DC: 2002), table 1-32. 2001 air carriers—USDOT, Bureau of Transportation Statistics, Air Carrier Traffic Statistics (Washington, DC: Annual December issues).",,,,,
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