|Certificated air carrier|
|Other 2-axle 4-tire vehicle||N||N||6,810||6,571||5,709||4,971||4,451||4,277||4,256||4,275||4,345||R4,539||R4,560||R4,563||4,591|
|Transit motor bus||N||N||N||N||2,742||R3,396||R3,723||3,767||R4,038||R3,944||R4,162||R4,155||R4,196||R4,228||P3,729|
a Included in passenger car.
b For 1995 and subsequent years, highway passenger-miles were taken directly from Highway Statistics rather than derived from vehicle-miles and average occupancy, as is the case for 1960-1994.
KEY: Btu = British thermal unit; N = data do not exist; P = preliminary; R = revised.
NOTES: To calculate total Btu, multiply fuel consumed (see tables 4-21, 4-22, 4-24, 4-25) by 135,000 Btu/gallon for air carrier, 125,000 Btu/gallonfor passenger car, other 2-axle 4-tire vehicle, and motorcycle, and 138,700 Btu/gallon for transit motor bus and Amtrak.
Certificated air carriers:
1960-99: Air Transport Association, Internet site http://www.air-transport.org/public/industry, as of July 5, 2000.
1960-99: U.S. Department of Transportation, Bureau of Transportation Statistics, Office of Airline Information, Internet site http://www.bts.gov/oai/fuel/fuelyearly.html, as of July 5, 2000.
1960-94: U.S. Department of Transportation, Federal Highway Administration, Highway Statistics Summary to 1995, FHWA-PL-97-009 (Washington, DC: July 1997), table VM-201A.
1995-98: Ibid. Highway Statistics (Washington, DC: Annual issues), table VM-1.
Other 2-axle 4-tire vehicle:
1970-94: Ibid., Highway Statistics Summary to 1995, FHWA-PL-97-009 (Washington, DC: July 1997), table VM-201A.
1995-98: Ibid., Highway Statistics (Washington, DC: Annual issues), table VM-1.
1970-85: Ibid., Highway Statistics Summary to 1985, FHWA-PL-97-009 (Washington, DC: July 1997), table VM-201A.
1990-98: Ibid., Highway Statistics (Washington, DC: Annual issues), table VM-1.
Transit motor bus:
1980-98: American Public Transportation Association, Public Transportation Fact Book (Washington, DC: March 2000), tables 30, 42; and 65.
1975-98: Amtrak, State and Local Affairs Department, personal communications.