Table 4-13:  Single-Unit 2-Axle 6-Tire or More Truck Fuel Consumption and Travela,,,,,,,,,,,,,,,,,,,,,,
,1970,1975,1980,1985,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999,2000,2001,2002,2003,2004,2005,2006,2007
Number registered (thousands),"3,681","4,232","4,374","4,593","4,487","4,481","4,370","4,408","4,906","5,024","5,266","5,293","5,735","5,763","5,926","5,704","5,651","5,849","6,161","6,395"," 6,649 "," 6,807 "
Vehicle-miles (millions),"27,100","34,600","39,800","45,400","51,900","52,900","53,900","56,800","61,300","62,705","64,072","66,893","68,021","70,304","70,500","72,448","75,866","77,757","78,441","78,496","(R) 80,344"," 81,954 "
Fuel consumed (million gallons),"3,968","5,420","6,923","7,399","8,357","8,172","8,237","8,488","9,032","9,216","9,409","9,576","6,817","9,372","9,563","9,667","10,321","8,880","8,959","9,501","(R) 9,852"," 10,035 "
Average miles traveled per vehicle (thousands),7.4,8.2,9.1,9.9,11.6,11.8,12.3,12.9,12.5,12.5,12.2,12.6,11.9,12.2,11.9,12.7,13.4,13.3,12.7,12.3,12.1,12.0
Average miles traveled per gallon,6.8,6.4,5.7,6.1,6.2,6.5,6.5,6.7,6.8,6.8,6.8,7.0,10.0,7.5,7.4,7.5,7.4,8.8,8.8,8.3,8.2,8.2
Average fuel consumed per vehicle (gallons),"1,078","1,281","1,583","1,611","1,862","1,824","1,885","1,926","1,841","1,835","1,787","1,809","1,189","1,626","1,614","1,695","1,826","1,518","1,454","1,486","(R) 1,482","1,474"
KEY: R = revised.,,,,,,,,,,,,,,,,,,,,,,
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"a Beginning in 1998, the Federal Highway Administration (FHWA) used the Census Bureau's 1997 Vehicle Inventory and Use Survey (VIUS) for its baseline estimate of single-unit 2-axle 6-tire or more trucks.  Prior to 1998, the FHWA used the Census Bureau's 1992 Transportation Inventory and Use Survey (TIUS) for its baseline estimates.  Therefore, post-1997 data may not be comparable to 1997 and earlier years.",,,,,,,,,,,,,,,,,,,,,,
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NOTES  ,,,,,,,,,,,,,,,,,,,,,,
"In 1995, the U.S. Department of Transportation, Federal Highway Administration revised its vehicle categories beginning with 1993 data to include passenger cars, other 2-axle 4-tire vehicles, single-unit 2-axle 6-tire or more trucks, and combination trucks. 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 most appropriate category. ",,,,,,,,,,,,,,,,,,,,,,
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SOURCES  ,,,,,,,,,,,,,,,,,,,,,,
"1970-94:  U.S. Department of Transportation, Federal Highway Administration, Highway Statistics Summary to 1995, FHWA-PL-97-009 (Washington, DC:  July 1997), table VM-201A, available at www.fhwa.dot.gov/policy/ohpi as of Mar. 23, 2009. ",,,,,,,,,,,,
"1995-2007: Ibid., Highway Statistics (Washington, DC:  Annual issues), table VM-1, available at www.fhwa.dot.gov/policy/ohpi as of Mar. 23, 2009.",,,,,,,,,,,,
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