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In 2016, there were 13,500 average daily vehicles per lane on urban interstates which was 2.5 times more than rural interstates (5,452). Travel density is measured as the average number of vehicles traveling in a highway lane on an average day. The travel density for other urban freeways and expressways in 2016 was 10,946 vehicles. From 2005 to 2016, the travel densities of these three roadway types has changed by less than 3%.

Travel density from 2005 to 2016 on rural interstates, urban interstates, and urban other freeways and expressways

Source: U.S. Department of Transportation, Federal Highway Administration, Highway Statistics 2016, Figure TC-201C. Based on data from the Highway Performance Monitoring System.

Fact #1066 Dataset

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