CDOT Online Transportation Information System

This is the access point to information frequently used for transportation planning and project development. Information is provided on current and projected traffic volumes, state highway attributes, summary roadway statistics and geographic data.

What's new?

IRIS 2019 is now available by searching for "IRIS" and looking under Documents and Downloadable Data. Roadway Reports for 2019 are also available under Reports -> Roadway Reports. (10/8/2020)
The MapView app has been upgraded to a new version. A recorded training is available. (12/27/19)