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 2021 is now available by searching for "IRIS" and looking under Documents and Downloadable Data. Roadway Reports for 2021 are also available under Reports -> Roadway Reports. (7/27/2022)
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2021 roadway images are now available in Windshield. (12/20/2021)
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