U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
Our Nation's Highways: 2008
Figure 1-3. The National Highway System
Our National Highway System (NHS) is a network of roadways that is important to the Nation’s economy, defense, and mobility. The NHS includes all Interstate highways (arterials), the Strategic Highway Network (defense purpose), intermodal connectors (roads connecting to major intermodal facilities), and other principal arterials. Currently, the NHS includes more than 160,000 miles of highway.
Data represented in the inset chart
Data Source: U.S. Department of Transportation, Federal Highway Administration.