Table 4-22: Energy Intensity of Passenger Cars, Other 2-Axle 4-Tire Vehicles, and Motorcycles

Table 4-22: Energy Intensity of Passenger Cars, Other 2-Axle 4-Tire Vehicles, and Motorcycles

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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 (R) 2006 2007 2008
Vehicle-miles (millions)                                                  
Passenger cara 587,000 723,000 917,000 1,034,000 1,112,000 1,247,000 1,408,000 1,358,000 1,372,000 1,375,000 1,406,000 1,438,000 1,470,000 1,503,000 1,550,000 1,569,000 1,600,287 1,628,332 1,658,474 1,672,079 1,699,890 1,708,421 1,690,534 1,672,467 1,615,850
Other 2-axle 4-tire vehicle N N 123,000 201,000 291,000 391,000 575,000 649,000 707,000 746,000 765,000 790,000 817,000 851,000 868,000 901,000 923,059 943,207 966,034 984,094 1,027,164 1,041,051 1,082,490 1,112,271 1,108,603
Motorcyclea U U 3,000 5,600 10,200 9,100 9,600 9,200 9,600 9,900 10,200 9,800 9,900 10,100 10,300 10,600 10,469 9,639 9,552 9,577 10,122 10,454 12,049 13,621 14,484
Passenger-miles (millions)                                                  
Passenger cara 1,145,000 1,395,000 1,751,000 1,954,000 2,012,000 2,094,000 2,282,000 2,200,000 2,208,000 2,213,000 2,250,000 2,287,000 2,337,000 2,389,000 2,464,000 2,495,000 2,544,457 2,556,481 2,620,389 2,641,885 2,685,827 2,699,305 2,671,044 2,642,498 2,553,043
Other 2-axle 4-tire vehicle N N 226,000 363,000 521,000 688,000 1,000,000 1,117,000 1,202,000 1,253,000 1,269,000 1,256,000 1,298,000 1,353,000 1,381,000 1,433,000 1,467,664 1,678,853 1,674,792 1,706,103 1,780,771 1,804,848 1,876,690 1,928,319 1,921,960
Motorcyclea U U 3,000 6,000 12,000 12,000 12,000 12,000 12,000 12,000 12,000 11,000 11,000 11,000 11,000 12,000 11,516 11,760 12,131 12,163 12,855 13,277 15,303 17,298 18,395
Average occupancy rate                                                  
Passenger cara 1.95 1.93 1.91 1.89 1.81 1.68 1.62 1.62 1.61 1.61 1.60 1.59 1.59 1.59 1.59 1.59 1.59 1.57 1.58 1.58 1.58 1.58 1.58 1.58 1.58
Other 2-axle 4-tire vehicle N N 1.84 1.81 1.79 1.76 1.74 1.72 1.70 1.68 1.66 1.59 1.59 1.59 1.59 1.59 1.59 1.78 1.73 1.73 1.73 1.73 1.73 1.73 1.73
Motorcyclea U U 1.00 1.07 1.18 1.32 1.25 1.30 1.25 1.21 1.18 1.12 1.11 1.09 1.07 1.13 1.10 1.22 1.27 1.27 1.27 1.27 1.27 1.27 1.27
Fuel consumed (million gallons)                                                  
Passenger cara 41,171 49,723 67,819 74,140 69,982 71,518 69,568 64,317 65,436 67,048 67,874 68,072 69,221 69,892 71,695 73,283 73,065 73,559 75,471 75,455 75,402 (R) 77,418 75,009 74,377 71,497
Other 2-axle 4-tire vehicle N N 12,313 19,081 23,796 27,363 35,611 38,217 40,929 42,851 44,112 45,605 47,354 49,388 50,462 52,859 52,939 53,522 55,220 60,758 63,417 (R) 58,869 60,685 61,836 61,199
Motorcyclea U U 60 113 204 182 191 184 191 198 205 196 198 202 206 212 209 193 191 192 202 (R) 189 221 242 256
Energy intensity (Btu/passenger-mile)b                                                  
Passenger cara 4,495 4,455 4,841 4,743 4,348 4,269 3,811 3,654 3,704 3,787 3,771 3,721 3,702 3,657 3,637 3,671 3,589 3,597 3,600 3,570 3,509 (R) 3,585 3,510 3,518 3,501
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 4,539 4,560 4,563 4,568 4,611 4,509 3,985 4,121 4,452 4,452 (R) 4,077 4,042 4,008 3,980
Motorcyclea U U 2,500 2,354 2,125 1,896 1,990 1,917 1,990 2,063 2,135 2,227 2,250 2,295 2,341 2,205 2,273 2,049 1,969 1,969 1,969 (R) 1,784 1,805 1,750 1,742

KEY: Btu = British thermal unit; N = data do not exist; R = revised; U = data are unavailable.

a Motorcycle was included in passenger car in 1960 and 1965.

b Energy Intensity (Btu/passenger-kilometer) is calculated by converting the fuel consumption in liters to the energy equivalent Btu units and dividing by the passenger-miles. The heat equivalent factor used for Btu conversion is 33,021.5046605 Btus/liter.

NOTES

In 1995, the U.S. Department of Transportation, Federal Highway Administration revised its vehicle type categories for 1993 and later data.

These new categories include passenger car, other 2-axle 4-tire vehicle, single-unit 2-axle 6-tire or more truck, and combination truck.

Other 2-axle 4-tire vehicle includes vans, pickup trucks, and sport utility vehicles. In previous years, some minivans and sport utility vehicles were included in the passenger car category. Single-unit 2-axle 6-tire or more trucks are on a single frame with at least 2 axles and 6 tires. Pre-1993 data have been reassigned to the closest available category.

Vehicle-miles and passenger-miles data for 1960 through 1999 have been rounded to the nearest billion miles.

For 1970-94, the unrevised motorcycle fuel consumed is subtracted from the combined passenger car and motorcycle fuel consumed from VM-201A.

1 mile = 1.609344 kilometers

1 gallon = 3.785412 liters

SOURCES

Vehicle-miles:

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.

1995-2008: Ibid., Highway Statistics (Washington, DC: Annual issues), Table VM-1, available at http://www.fhwa.dot.gov/policy/ohpi/hss/hsspubs.cfm as of Feb. 17, 2010.

Other 2-axle 4-tire vehicle:

1970-94: Ibid., Highway Statistics, Summary to 1985 (Washington, DC: 1986), Table VM-201A.

1995-2008: Ibid., Highway Statistics (Washington, DC: Annual issues), Table VM-1, available at http://www.fhwa.dot.gov/policy/ohpi/hss/hsspubs.cfm as of Feb. 17, 2010.

Motorcycle:

1970-94: Ibid., Highway Statistics, Summary to 1985 (Washington, DC: 1986), Table VM-201A.

For 1970-94, the unrevised motorcycle vehicle-miles are subtracted from the combined passenger car and motorcycle vehicle-miles from VM-201A.

1995-2008: Ibid., Highway Statistics (Washington, DC: Annual issues), Table VM-1, available at http://www.fhwa.dot.gov/policy/ohpi/hss/hsspubs.cfm as of Feb. 17, 2010.

Passenger-miles:

1960-97: Vehicle-miles multiplied by vehicle occupancy rates.

1998-2008: Ibid., Highway Statistics (Washington, DC: Annual issues), Table VM-1, available at http://www.fhwa.dot.gov/policy/ohpi/hss/hsspubs.cfm as of Feb. 17, 2010.

Fuel consumed:

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.

1995-2008: Ibid., Highway Statistics (Washington, DC: Annual issues), Table VM-1, available at http://www.fhwa.dot.gov/policy/ohpi/hss/hsspubs.cfm as of Feb. 17, 2010.