Table 11
Fuel Efficiency of Combination Trucks, 19802002

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Year Registrations (thousands)
'(1)
Vehicle Travel (million miles)
'(2)
Fuel Use (million gallons)
'(3)
Fuel Efficiency (miles per gallon) [(2)/(3)]
'(4)
1980 1,417 68,678 13,037 5.3
1981 1,261 69,134 13,509 5.1
1982 1,265 70,765 13,583 5.2
1983 1,304 73,586 13,796 5.3
1984 1,340 77,377 14,188 5.5
1985 1,403 78,063 14,005 5.6
1986 1,408 81,038 14,475 5.6
1987 1,530 85,495 14,990 5.7
1988 1,667 88,551 15,224 5.8
1989 1,707 91,879 15,733 5.8
1990 1,709 94,341 16,133 5.8
1991 1,691 96,645 16,809 5.7
1992 1,675 99,510 17,216 5.8
1993 1,680 103,116 17,748 5.8
1994 1,681 108,932 18,653 5.8
1995 1,696 115,451 19,777 5.8
1996 1,747 118,899 20,192 5.9
1997 1,790 124,584 20,302 6.1
1998 1,831 128,159 21,100 6.1
1999 2,029 132,384 24,537 5.4
2000 2,097 135,020 25,666 5.3
2001 2,154 136,584 25,512 5.4
2002 2,277 138,643 26,451 5.2
Growth Rates - Average Annual Percentage Rates
1987-2002 2.7 3.3 3.9 -0.6
1987-1995 1.3 3.8 3.5 0.2
1995-2001 4.1 2.8 4.3 -1.2
2001-2002 5.7 1.5 3.7 -3.7

Source: U. S. Department of Transportation, Federal Highway Administration, Highway Statistics 2002, Washington, DC, 2003, Table VM1 and annual. (Additional resources: www.fhwa.dot.gov)

Note: The Federal Highway Administration changed the combination truck travel methodology in 1993. Combination trucks include all trucks designed to be used in combination with one or more trailers. The average vehicle travel of these trucks (on a per truck basis) far surpasses the travel of other trucks due to long-haul freight movement.




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