Table 10,,,,,
Vehicle-Miles,,,,,
"(Millions)
",,,,,
Mode,1970,1980,1990,2000,2001
Air carriers ,"2,068","2,523","3,963","5,664","5,550"
General aviation,"3,207","5,204","4,548",aN,aN
Passenger cars,"916,700","1,111,596","1,408,266","1,600,287","1,619,422"
Motorcycles,"2,979","10,214","9,557","10,469","9,529"
"Other 2-axle, ",,,,,
4-tire vehiclesb,"123,286","290,935","574,571","923,059","937,839"
Trucks:,,,,,
Single-unit,"27,081","39,813","51,901","70,500","72,286"
Combination,"35,134","68,678","94,341","135,020","135,400"
Busesc,"4,544","6,059","5,726","7,590","6,986"
Rail:d,,,,,
Transite,441,403,561,648,P662
Commuter,N,179,213,271,P277
Class I freight,"29,890","29,277","26,159","34,590","34,243"
Intercity/Amtrakf,690,235,301,368,378
Other transitg,N,15,324,833,P867
"a The 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 U.S. Department of Transportation, 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.",,,,,
Key: N = data are nonexistent; P = preliminary; R = revised.,,,,,
"Sources: Except as noted, various sources, as cited in U.S. Department of Transportation (USDOT), Bureau of Transportation Statistics (BTS), National Transportation Statistics 2002, available at http://www.bts.gov, table 1-32. 2001 air carriers—USDOT, Bureau of Transportation Statistics, Air Carrier Traffic Statistics (Washington, DC: Annual December issues).",,,,,
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