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Table 4-20: Energy Intensity of Passenger Modes
(Btu per passenger-mile)
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| Air, certificated carrier |
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| Domestic operations |
8,633 |
10,118 |
10,185 |
7,746 |
5,742 |
5,047 |
4,932 |
4,671 |
4,564 |
4,558 |
4,444 |
4,382 |
4,183 |
4,166 |
4,123 |
4,049 |
3,883 |
3,890 |
3,596 |
(R) 3,496 |
(R) 3,410 |
(R) 3,222 |
3,098 |
| International operations |
9,199 |
10,292 |
10,986 |
8,465 |
4,339 |
5,103 |
4,546 |
4,609 |
4,258 |
4,099 |
4,145 |
4,173 |
4,108 |
4,168 |
4,278 |
4,123 |
3,833 |
3,965 |
3,920 |
(R) 4,178 |
(R) 3,888 |
(R) 3,813 |
3,691 |
| Highwaya |
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| Passenger car |
4,495 |
4,455 |
4,841 |
4,743 |
4,348 |
4,269 |
3,811 |
3,654 |
3,703 |
3,785 |
3,771 |
3,721 |
3,688 |
3,657 |
3,637 |
3,672 |
3,589 |
3,597 |
3,600 |
3,570 |
3,509 |
(R) 3,585 |
3,525 |
| Other 2-axle 4-tire vehicle |
N |
N |
6,810 |
6,571 |
5,709 |
4,971 |
4,539 |
4,277 |
4,256 |
4,275 |
4,345 |
4,538 |
4,541 |
4,564 |
4,569 |
4,612 |
4,509 |
3,985 |
4,121 |
4,452 |
4,452 |
(R) 4,077 |
4,016 |
| Motorcycle |
b |
b |
2,500 |
2,354 |
2,125 |
1,896 |
2,227 |
1,917 |
1,990 |
2,063 |
2,135 |
2,274 |
2,271 |
2,273 |
2,273 |
2,273 |
2,273 |
2,049 |
1,969 |
1,969 |
1,969 |
(R) 1,784 |
1,754 |
| Transit motor bus |
N |
N |
N |
N |
2,742 |
3,389 |
3,723 |
3,767 |
4,038 |
3,944 |
4,162 |
4,155 |
4,196 |
4,228 |
4,133 |
4,044 |
4,147 |
3,698 |
3,550 |
3,514 |
3,572 |
3,393 |
3,262 |
| Amtrak |
N |
N |
N |
2,383 |
2,148 |
2,089 |
2,066 |
1,978 |
2,035 |
2,023 |
1,935 |
1,838 |
2,153 |
2,200 |
2,138 |
2,107 |
2,134 |
2,100 |
U |
U |
U |
U |
U |
KEY: Btu = British thermal unit; N
= data do not exist; R = revised; U = data are not available.
a 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.
b Included in passenger car.
NOTE
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/gallon for passenger car, other 2-axle 4-tire vehicle, and motorcycle; 138,700 Btu/gallon for transit motor bus and Amtrak diesel consumption; and 3,412 Btu/KwH for Amtrak electric consumption.
SOURCES
Air:
Certificated air carriers:
Passenger-miles:
1960-80: Air Transport Association, Internet site http://www.airlines.org as of Aug. 30, 2004.
1985-2006: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, Office of Airline Information, Air Carrier Traffic Statistics (Washington DC: Annual December issues).
Fuel consumed:
U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, Office of Airline Information, available at http://www.bts.gov/oai/fuel/fuelyearly.html as of Mar. 27, 2008.
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.
1995-2006: 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.
1995-2006: 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.
1990-2006: Ibid., Highway Statistics (Washington, DC: Annual issues), table VM-1.
Transit motor bus:
American Public Transportation Association, 2008 Public Transportation Fact Book, Historical Tables (Washington, DC: Annual issues), tables 2 and 28, and similar tables in earlier editions.
Amtrak:
Amtrak, State and Local Affairs Department, personal communication, Apr. 21, 2008
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