Locations and areas of Colorado cities, towns, municipal perimeters, and FIPS codes from the Colorado Department of Transportation (CDOT).

Airport locations, nearby city, recreation in the area, and more with associated data (hours, annual number of passengers, etc) from the Colorado Department of Transportation (CDOT).

Point locations of mileposts for start and end of road projects and associated improvement codes and timelines for active construction projects on funded roads in Colorado August 2010 through March 2017 from the Colorado Department of Transportation (CDOT). Use this data with Construction Projects Line Segments.

The mile points for every interstate highway in Colorado, from the Colorado Department of Transporation