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).

Each year, the Department of Transportation publishes a Performance Plan. Performance Plans summarize the near-term strategic and operational priorities for the Department, and explicitly connect organizational objectives to a system for managing the achievement of these priorities. The Performance Plan contains much detail about the work of the Department, to the level of individual processes by which they deliver goods and services to their customers, alongside their current focus areas. This is a core part of our approach for Customer- and Taxpayer-Focused Performance Management.

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.

CDOT web site that shows HOW and WHERE CDOT spends transportation dollars plus more.

Transportation Improvement Program projects, and other associated datasets. 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.

Features in this dataset represent traffic counts on public roads under local jurisdiction that are functionally classified as arterials or collectors. Features are represented by polyline (linear) geographic shapes from the Colorado Department of Transportation (CDOT), for 2014

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

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

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.