Traffic counts on highways and various calculations, from Colorado Department of Transportation (CDOT), for 2015

COTrip.org has a real-time travel data feed provided by Intelligent Transportation Systems (ITS), a division of CDOT, for data including Incidents, Weather Stations, etc.
You can access the feed here:
https://manage-api.cotrip.org/
For further information or assistance, please visit the following link:
https://maps.cotrip.org/help/section/for-developers.html

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.

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.

Traffic counts on highways and various calculations, from Colorado Department of Transportation (CDOT), for 2017

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.

Mileposts (or mile markers) along highways and their locations collection during GPS mapping efforts in the early 2000s from the Colorado Department of Transportation (CDOT).

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

Inventory of schools in the DRCOG region, including K-12 schools, colleges, technical schools, and more.

Route locations, segment lengths and route identifiers, from the Colorado Department of Transportation (CDOT).