Local road segments in Colorado with Curve and Grade data, data on High-Occupancy Lanes, Restricted Lanes, Reversible Lanes, Express or Toll Lanes.

Road attributes including number of lanes, surface type, roughness factor, etc. from the Colorado Department of Transportation (CDOT).

Road attributes including number of lanes, surface type, roughness factor, etc since 1970 from the Colorado Department of Transportation (CDOT).

Highway grades in sections across Colorado. Contains detailed data for state highways, including grades from the Colorado Department of Transportation (CDOT).

Highway curvatures in sections across Colorado. Contains detailed data for state highways, including curvature from the Colorado Department of Transportation (CDOT).

Road attributes including number of lanes, surface type, roughness factor, etc. from the Colorado Department of Transportation (CDOT).