U.S. Department of Energy - Energy Efficiency and Renewable Energy
Vehicle Technologies Office
Fact #384: August 8, 2005
The National Highway System, 2003
The National Highway System (NHS) Designation Act of 1995 (Public Law 104-59) was enacted to specify a network of nationally significant highways. It includes the Interstate system plus more than 100,000 miles of arterial and other roads.
The Interstate represents only 1% of the nation's total public road miles and 3% of its lane miles, but carries almost 24% of the travel. Most travel on interstate highways takes place in urban areas even though there are more interstate miles in rural areas.
National Highway System, 2003
|All public roads
|National Highway System
Source: Federal Highway Administration (FHWA), Highway Statistics 2003, Tables HM-41, HM-20, HM-48, and VM-3
Graphic from FHWA, Our Nation's Highways 1998
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