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Energy Intensity of Light Duty Vehicles and Motorcycles (Metric)
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.
Data from 2007 were calculated using a new methodology developed by FHWA. Data for these years are based on new categories and are not comparable to previous years. The new category Light duty vehicle, short wheel base replaces the old category Passenger car and includes passenger cars, light trucks, vans and sport utility vehicles with a wheelbase (WB) equal to or less than 121 inches. The new category Light duty vehicle, long wheel base replaces Other 2-axle, 4-tire vehicle and includes large passenger cars, vans, pickup trucks, and sport/utility vehicles with wheelbases (WB) larger than 121 inches. This edition of 4-22M is not comparable to those before the 2019 edition.
For 1970-94, the unrevised motorcycle fuel consumed is subtracted from the combined passenger car and motorcycle fuel consumed from VM-201A.
Vehicle-kilometers and Passenger-kilometers data for 1960 through 1999 have been rounded to the nearest billion kilometers.
1 mile = 1.609344 kilometers
1 gallon = 3.785412 liters
1 Btu = 1.055056 kilojoules
KEY: Btu = British thermal unit; N = data do not exist; U = data are not available; R = revised.
aMotorcycle is included in Light duty vehicle, short wheel base (previously Passenger car) in 1960 and 1965.
b Energy Intensity (Btu/passenger-kilometer) is calculated by converting the fuel consumption in gallons to the energy equivalent Btu units and dividing by the passenger-kilometers. The heat equivalent factor used for Btu conversion is 125,000 Btus/gallon.
1960-94: Vehicle-miles multiplied by vehicle occupancy rates.
1995-2018: U.S. Department of Transportation, Federal Highway Administration, Highway Statistics (Washington, DC: Annual Issues), table VM-1, available at http://www.fhwa.dot.gov/policyinformation/statistics.cfm as of Mar. 19, 2020.
All other data:
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.
1995-2018: Ibid., Highway Statistics (Washington, DC: Annual Issues), table VM-1, available at http://www.fhwa.dot.gov/policyinformation/statistics.cfm as of Mar. 19, 2020.