Table 4-24M: Energy Intensity of Transit Motor Buses

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  1960 1965 1970 1975 1980 1985 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011
Vehicle-kilometers (millions) 2,537 2,460 2,268 2,456 2,699 2,998 3,428 3,487 3,505 3,556 3,479 3,514 2,692 2,744 2,841 2,931 2,993 3,079 3,077 2,997 2,976 2,961 2,956 2,995 3,050 3,060 2,974 2,829
Passenger-kilometers (millions) N N N N 35,068 34,055 33,766 33,941 32,728 32,584 30,307 30,285 25,460 26,565 27,248 28,253 28,365 29,535 29,104 27,463 26,847 27,413 28,149 28,131 29,449 28,976 28,435 27,690
Energy consumed                                                        
Diesel fuel (million liters) 787 939 1,026 1,382 1,632 1,961 2,132 2,169 2,241 2,179 2,139 2,134 1,763 1,754 1,773 1,804 1,853 1,862 1,773 1,672 1,668 1,421 1,597 1,535 1,526 1,462 1,397 1,341
Compressed Natural Gas (million liters) N N N N N N N N N N N 38 38 67 103 126 159 193 246 296 323 351 413 402 421 470 402 402
Bio-diesel (million liters) N N N N N N N N N N N N N N N N N N 3 3 8 195 61 78 125 134 119 132
Liquefied natural gas (million liters) N N N N N N N N N N N 6 8 12 10 17 33 37 53 44 50 55 58 57 56 52 50 43
Gasoline (million liters) N N N N N N N N N N N 9 4 5 6 4 4 5 4 3 5 3 7 7 11 11 13 16
Other major fuelsa (million liters) N N N N N N N N N N N N 43 34 16 9 3 4 8 8 8 11 8 4 3 4 (R) 4 2
Powerb (million KWH) N N N N N N N N N N N N (R) 0 (R) 0 (R) 1 (R) 1 (R) 1 (R) 1 (R) 3 (R) 1 (R) 2 (R) 1 (R) 1 (R) 1 (R) 1 (R) 1 (R) 1 1
Energy consumed, total (Billion kilojoules) N N N N N N N N N N N N 69,603 69,471 69,992 71,266 73,644 74,334 71,846 68,023 68,389 65,721 68,317 66,322 67,780 65,957 (R) 62,458 60,684
Diesel fuel 30,438 36,291 39,657 53,413 63,071 75,817 82,409 83,830 86,638 84,252 82,689 82,500 68,160 67,799 68,541 69,751 71,646 71,974 68,535 64,642 64,464 54,914 61,729 59,337 58,981 56,523 54,017 51,859
Compressed Natural Gas N N N N N N N N N N N 237 240 420 647 790 999 1,211 1,543 1,856 2,027 2,199 2,589 2,521 2,640 2,950 2,519 2,521
Bio-diesel N N N N N N N N N N N N N N N N N N 103 113 283 6,850 2,138 2,745 4,380 4,721 4,169 4,640
Liquefied natural gas N N N N N N N N N N N 152 200 289 230 392 781 875 1,253 1,049 1,178 1,295 1,381 1,354 1,330 1,238 1,174 1,023
Gasoline N N N N N N N N N N N 303 132 175 199 143 134 163 139 122 190 102 243 251 373 394 440 558
Other major fuelsa N N N N N N N N N N N N 867 786 368 182 73 101 246 225 226 349 223 101 65 122 (R) 132 72
Powerb N N N N N N N N N N N N 3 3 7 9 10 11 27 15 21 13 13 11 10 8 (R) 8 10
Energy intensity (kilojoules/passenger-kilometer) N N N N N N N N N N N N 2,734 2,615 2,569 2,522 2,596 2,517 2,469 2,477 2,547 2,397 2,427 2,358 2,302 2,276 (R) 2,197 2,192

KEY: N = data do not exist; R = revised.

a Before 2002, Other major fuels include liquefied petroleum gas, methanol, ethanol, and bunker fuel. From 2002 to 2010, Other major fuels include liquefied petroleum gas, methanol, ethanol, bunker fuel, kerosene, and grain additive.

bPower includes electric propulsion and electric battery.

NOTES

Data from 1996 and after are not comparable to the data for earlier years or to the data published in previous editions of the report due to different data sources used.

Data from 1996 and after are for those vehicles used for directly operated (DO) services only .

Energy consumed, total does not include the other types of energy identified in table 17 in the National Transit Database due to the lack of information on the unit of measurement for such data before 2008.

The following conversion rates were used:

Diesel =38,657.95 kilojoules/liter.

Compressed Natural Gas = 6,271.117 kilojoules/liter.

Bio-Diesel = 35,174.00 kilojoules/liter.

Liquefied natural gas = 23,635.15 kilojoules/liter.

Gasoline = 34,839.54 kilojoules/liter.

Liquefied petroleum gas = 25,446.80 kilojoules/liter.

Methanol = 18,005.07 kilojoules/liter.

Ethanol = 23,579.40 kilojoules/liter.

Bunker fuel = 41,723.83 kilojoules/liter.

Kerosene = 37,626.70 kilojoules/liter.

Grain additive = 33,696.80 kilojoules/liter.

Electricity 1KWH = 3,412 Btu, negating electrical system losses. This table includes approximate electrical system losses, and thus the conversion factor is multiplied by 3.

1.609344 kilometers = 1 mile.

3.785412 liters = 1 gallon.

1.055056 kilojoules = 1 British thermal unit (Btu).

SOURCES

1960-95: American Public Transportation Association, 2010 Public Transportation Fact Book Appendix A: Historical Tables (Washington, DC: Annual Issues), tables 2, 6, 30, 32 and similar tables in earlier editions, available at http://www.apta.com/resources/statistics/Pages/transitstats.aspx as of Aug 23, 2010.

1996-2010: U.S. Department of Transportation, Federal Transit Administration, National Transit Database, tables 17, 19, and similar tables in earlier editions, available at http://www.ntdprogram.gov/ntdprogram/data.htm as of Feb. 4, 2013.