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Federal
Road Length by Measured Pavement Roughness, 2000-2024 (HM-64)
Department of Transportation —
Annual road length by measured pavement roughness using the IRI (International Roughness Index) by functional class for the 50 states, DC, and PR from the Highway... -
Federal
HPMS Spatial All Sections - 2024
Department of Transportation —
A GeoJSON file with all spatial roadway data for all sections from the 2024 Highway Performance Monitoring System (HPMS) attached to the All Road Network of Linear... -
Federal
Highway Data Element Dictionary
Department of Transportation —
This is list of data elements and their attributes that are used by data assets at the Federal Highway Administration.