Appendix 5.
U.S. Trucks and Buses: Number of Vehicles and Oil Consumption

Trucks and Buses as a Proportion of Total Road Vehicles

* The category “heavy trucks” includes buses.

Sources: Chart 1: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, 2007, Table 1-11.  Chart 2: U.S. Department of Energy, Transportation Energy Data Book Edition 28-2009 Table 1.16