TABLE 19/20  Share of Loadings on Interstate Highways: 2001,,,,
(Percent),,,,
,,,,
Location,"Passengers, cars, buses, and light trucks",Heavy single-unit trucks,3- and 4-axle combination trucks,5-axle or more combination trucks
Rural,2,6,4,89
Urban,3,14,5,77
"NOTES: Based on data from the Truck Weight Study which are collected by the States for varying time periods each year and are not adjusted to typify annual averages. Loadings are based on equivalent single -axle loads (ESALs), a standard unit of pavement damage based on the amount of force applied to pavement by an 18,000-pound axle, which is roughly equivalent to a standard truck axle. Raw data are not available.",,,,
"
SOURCE: U.S. Department of Transportation, Federal Highway Adminstration, Highway Statistics 2001 (Washington, DC: 2002), table TC-3.",,,,