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

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

The tunnel maintenance program tracks CDOT progress in maintaining tunnels on the State Highway System. A letter grade is given every year on maintenance activities at the Eisenhower-Johnson and Hanging Lake tunnels on I-70. Maintenance on these aging tunnels includes tunnel washing and sweeping, ventilation maintenance, snow removal, emergency response and round-the-clock television surveillance.

Traffic counts on highways and various calculations, from Colorado Department of Transportation (CDOT), for 2016

Highway segments and the various quality assurance data along with the overall grade, from the 2015 review of the Colorado Department of Transportation (CDOT).

CDOT measures the overall performance of its maintenance program by assigning letter grades to nine program areas, such as Snow and Ice Removal, Roadway Striping, Sign and Signal Maintenance, and Rest Area Maintenance. The overall grade for maintenance reflects the performance of all nine areas.

Highway segments and the various quality assurance data along with the overall grade, from the 2017 review of the Colorado Department of Transportation (CDOT).

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

Highway segments and the various quality assurance data along with the overall grade, from the 2016 review of the Colorado Department of Transportation (CDOT).

Annual Regional Crash Data going back to 2004. This data can be searched by keyword or browsed by subject and are available in a variety of formats, including KML, WMS, GeoRSS, and Shapefile.