Table 4-24M:  Energy Intensity of Transit Motor Buses ,,,,,,,,,,,,,,,,,,,
,1960,1965,1970,1975,1980,1985,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999,2000,2001,(P) 2002
Vehicle-kilometers (millions),"2,536","2,459","2,268","2,456","2,699","2,998","3,428","3,487","3,505","3,557","3,479","3,515","3,574","3,613","3,500","3,663","3,725","3,825","3,880"
Passenger-kilometers (millions),N,N,N,N,"35,084","34,118","33,766","33,941","32,728","32,584","30,307","30,285","30,732","31,550","32,766","34,126","34,184","35,441","35,151"
Fuel consumed (million liters diesel) ,787,939,"1,026","1,382","1,632","1,961","2,132","2,169","2,241","2,179","2,139","2,134","2,187","2,264","2,296","2,340","2,404","2,222","2,116"
Energy intensity (kilojoules / passenger-kilometers),N,N,N,N,"1,798","2,222","2,441","2,470","2,647","2,586","2,729","2,724","2,751","2,772","2,710","2,651","2,719","2,424","2,894"
KEY:  N = data do not exist; P = preliminary.,,,,,,,,,,,,,,,,,,,
NOTES,,,,,,,,,,,,,,,,,,,
"Heat equivalent factor used for joule conversion is 38,657,950 joules/liter.",,,,,,,,,,,,,,,,,,,
1.609344 kilometers = 1 mile.,,,,,,,,,,,,,,,,,,,
3.785412 liters = 1 gallon.,,,,,,,,,,,,,,,,,,,
0.6555814 kilojoule per passenger-kilometer = 1 British thermal unit (Btu) per passenger-mile.,,,,,,,,,,,,,,,,,,,
SOURCE,,,,,,,,,,,,,,,,,,,
"American Public Transportation Association, Public Transportation Fact Book (Washington, DC: February 2004), tables 38 and 70, and similar tables in earlier editions. ",,,,,,,,,,,,,,,,,,,