Table 4-20. Energy Intensity of Passenger Modes (Btu per passenger-mile)
Table 4-20. Energy Intensity of Passenger Modes (Btu per passenger-mile)
| 1960 | 1965 | 1970 | 1975 | 1980 | 1985 | 1990 | 1991 | 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AirR | |||||||||||||||
| Certificated air carrier | |||||||||||||||
| Domestic operations | 8,633 | 10,118 | 10,185 | 7,746 | 5,727 | 5,047 | 4,932 | 4,671 | 4,564 | 4,558 | 4,444 | 4,382 | 4,183 | 4,146 | 4,123 |
| International operations | 9,199 | 10,292 | 10,986 | 8,465 | 8,866 | 5,103 | 4,546 | 4,609 | 4,258 | 4,099 | 4,145 | 4,173 | 4,108 | 4,168 | 4,278 |
| Highwayb | |||||||||||||||
| Passenger car | 4,495 | 4,455 | 4,841 | 4,743 | 4,348 | 4,267 | 3,812 | 3,654 | 3,703 | 3,785 | 3,771 | 3,721 | 3,702 | 3,657 | 3,672 |
| 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 |
| Motorcycle | a | a | 2,500 | 2,354 | 2,125 | 1,896 | 1,990 | 1,917 | 1,990 | 2,063 | 2,135 | R2,227 | R2,250 | R2,295 | 2,330 |
| 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 |
| Amtrak | N | N | N | 2,383 | R2,164 | R2,094 | R2,064 | 1,978 | R2,035 | R2,023 | 1,935 | 1,838 | R2,148 | 2,200 | 2,138 |
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.
SOURCES:
Air:
Certificated air carriers:
Passenger-miles:
1960-99: Air Transport Association, Internet site http://www.air-transport.org/public/industry, as of July 5, 2000.
Fuel consumed:
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.
Highway
Passenger car:
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.
Motorcycle:
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.
Amtrak:
1975-98: Amtrak, State and Local Affairs Department, personal communications.