Highway vehicles were responsible for 80.7% of all transportation energy use in 2008. Light vehicles make up the majority of highway fuel use.

Transportation Energy Use by Mode, 2008
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Supporting Information

Transportation Energy Use by Mode, 2008
ModeQuadrillion BtuPercentage of Total
HIGHWAY21.780.7%
Light vehicles16.461.3%
Buses0.20.7%
Medium/heavy trucks5.018.7%
NONHIGHWAY5.219.3%
Air2.48.9%
Water1.24.6%
Pipeline0.93.4%
Rail0.62.4%
TOTAL26.8100.0%

Source: Davis, Stacy, Susan Diegel, and Robert Boundy, Transportation Energy Data Book: Edition 29, Oak Ridge National Laboratory, July 2010.

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