Btu per passenger-mile
|Passenger cars||Light-duty trucks||Transit buses||Aircraft (domestic)||Amtrak|
KEY: Btu = British thermal unit.
NOTE: Light-duty trucks are defined by the source as "Other 2-axle 4-tire vehicles" and are less than 6,000 lbs gross vehicle weight rating (GVWR).
SOURCES: Aircraft: Research and Innovative Technology Administration, Bureau of Transportation Statistics; Passenger cars and Light-duty trucks: Federal Highway Administration; Transit buses: Federal Transit Administration; Amtrak: National Railroad Passenger Corporation (Amtrak) as cited in U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, National Transportation Statistics, table 4-20, available at http://www.bts.gov/publications/national_transportation_statistics/ as of April 2010.