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

Highway curvature and gradient data in sections across Colorado since 1998. Contains detailed data on selected roadways, including rigidity, flexibility, curvature, grade, sight distance, speed limits, length of green time, etc from the Colorado Department of Transportation (CDOT).

A letter grade is used to rate traffic services. This maintenance program ensures that stripes on traffic lanes are clearly marked, highway signs are visible, traffic signals are functioning properly and guardrails are intact and functioning.

Congestion measurements are defined by travel-time delay, which is the difference between the travel time on highways at the free flow speed and the time spent in current traffic. In 2012, the average travel-time delay on all congested corridors was 17.2 minutes per traveler, per day. A highway is considered congested when the peak traffic volume is 85 percent or greater than what the highway was designed to sustain.

CDOT provides a wealth of useful traffic-related data through its XML data feeds. Find out more about this high-valuable resource by clicking on the External Link HTM button.

Traffic counts on public roads under local jurisdiction in 2015. Provided by the CDOT.

Traffic counts on highways and various calculations, from Colorado Department of Transportation (CDOT), for 2018

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

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

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.