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Public Road Length by Functional System and State, 1980 - 2024 (HM-20)
U.S Department of Transportation
Updated Oct 25, 2026
About this dataset
Annual length of U.S. public roads in miles by functional system for each of the 50 states, DC, and Puerto Rico from the Highway Statistics table HM-20. (Note: In 2009, the Urban functional class of Collectors became Major Collectors and Minor Collectors.)
Data and resources (3)
- CSV
Public Road Length by Functional System and State, 1980 - 2024 (HM-20)
Modified Oct 25, 2026Table and Data API available
- JSON
Public Road Length by Functional System and State, 1980 - 2024 (HM-20)
Modified Aug 25, 2026
- XSL
Public Road Length by Functional System and State, 1980 - 2024 (HM-20)
Modified Aug 25, 2026