"Table 4-22:  Energy Intensity of Passenger Cars, Other 2-Axle 4-Tire Vehicles, and Motorcycles",,,,,,,,,,,,,,,,,,,,,,,
,1960,1965,1970,1975,1980,1985,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999,2000,2001,2002,2003,2004,(R) 2005,2006
Vehicle-miles (millions),,,,,,,,,,,,,,,,,, ,,,,,
Passenger car,"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","1,682,671"
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","1,089,013"
Motorcycle,b,b,"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","12,401"
Passenger-miles (millions)a,,,,,,,,,,,,,,,,,,,,,,,
Passenger car,"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","2,658,621"
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","1,887,997"
Motorcycle,b,b,"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","15,750"
Average occupancy rate,,,,,,,,,,,,,,,,,,,,,,,
Passenger car,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
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
Motorcycle,b,b,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
Fuel consumed (million gallons),,,,,,,,,,,,,,,,,,,,,,,
Passenger car,"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","77,419","74,983"
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","58,869","60,662"
Motorcycle,b,b,60,113,204,182,191,184,191,198,205,196,198,202,206,212,209,193,191,192,202,189,220
Energy intensity (Btu/passenger-mile)c,,,,,,,,,,,,,,,,,,,,,,,
Passenger car,"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","3,585","3,525"
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","4,077","4,016"
Motorcycle,b,b,"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","1,779","1,746"
KEY: Btu = British thermal unit; N = data do not exist; R = revised.,,,,,,,,,,,,,,,,,,,,,,,
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b Included in passenger car.,,,,,,,,,,,,,,,,,,,,,,,
"c Energy Intensity (Btu/passenger-mile) is calculated by converting the fuel consumption in gallons to the energy equivalent Btu units and dividing by the passenger-miles.  The heat equivalent factor used for Btu conversion is 125,000 Btus/gallon.",,,,,,,,,,,,,,,,,,,,,,,
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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.,,,,,,,,,,,,,,,,,,,,,,,
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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.",,,,,,,,,,,,,,,,,,,,
"1995-2005: Ibid., Highway Statistics (Washington, DC: Annual issues), table VM-1.",,,,,,,,,,,,,,,,,,,,
Other 2-axle 4-tire vehicle:,,,,,,,,,,,,,,,,,,,,
"1970-94: Ibid., Highway Statistics, Summary to 1985 (Washington, DC: 1986), table VM-201A.",,,,,,,,,,,,,,,,,,,,
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.",,,,,,,,,,,,,,,,,,,,
"1995-2006: Ibid., Highway Statistics (Washington, DC: Annual issues), table VM-1.",,,,,,,,,,,,,,,,,,,,
Passenger-miles: ,,,,,,,,,,,,,,,,,,,,
1960-97:  Vehicle-miles multiplied by vehicle occupancy rates.,,,,,,,,,,,,,,,,,,,,
"1998-2006:  Ibid., Highway Statistics (Washington, DC:  Annual issues), table VM-1.",,,,,,,,,,,,,,,,,,,,
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.",,,,,,,,,,,,,,,,,,,,
"For 1970-94, the unrevised motorcycle fuel consumed is subtracted from the combined passenger car and motorcycle fuel consumed from VM-201A.",,,,,,,,,,,,,,,,,,,,
"1995-2006: Ibid., Highway Statistics (Washington, DC: Annual issues), table VM-1.",,,,,,,,,,,,,,,,,,,,
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