Colorado Highway and Frontage road milepost locations. Mileposts are locations of milepost (mile marker) locations alongside CDOT highways, collected during GPS mapping efforts in the early 2000s. MIleposts differ from milepoints in that milepoints represent the location along CDOT highways where that highway's linear reference system indicates a whole number reference point (such as 57.000). Therefore, mileposts are not necessarily found at exactly at milepoints. Also includes collection date of point, route ID and some GPS locations.

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

Traffic counts on public roads under local jurisdiction in 2017. Provided by the CDOT.

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

Contains location and counts for number of pedestrians and bikers to pass by a specific spot, for a selected number of locations in Colorado. Counts for each hour are reported in a 24 hour period, with stations collecting bicyclist counts, pedestrian counts and sometimes both using pneumatic hose tubes, in road loops and infrared devices. Number of Unique Locations, defined by relative description and by lat/long, for stations within each of 17 counties in Colorado: Adams(8), Arapahoe(7), Boulder(9), Denver(26), Douglas(11), Eagle(4), El Paso(7), Garfield(2), Jefferson(17), La Plata(3), Larimer(3), Mesa(2), Pueblo(4), Routt(3), Summit(1), Weld(8). This dataset is reported annually.

Sign location and direction information from the Colorado Department of Transportation (CDOT) (links to Sign Posts and Sign Panels).

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.

Traffic counts on public roads under local jurisdiction in 2016. Provided by the CDOT.

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

Line segment data of CDOT designated scenic byways in Colorado.