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United States Department of Transportation United States Department of Transportation

National Highway System, Intermodal Connectors, and Principal Arterials: 2018

Figure

Map of the U.S. showing highways, principal arterials and intermodal nodes as of 2018

Notes:

NHS = National Highway System or the interstate highway system; STRAHNET = Strategic Highway Network or a network of highways that are important to the U.S. strategic defense policy. MAP-21 principal arterials = those rural and urban roads serving major population 
centers not already categorized above.

Description:

This map is included in the Transportation Statistics Annual Report 2020 publication. 

Source:

U.S. Department of Transportation (USDOT), Federal Highway Administration, Highway Performance Monitoring System, as cited in USDOT, Bureau of Transportation Statistics, National Transportation Atlas Database, available at www.bts.gov as of September 2018.