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 2020 is now available by searching for "IRIS" and looking under Documents and Downloadable Data. (9/15/2021)
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Our Reports page has a new look! Click on the Reports tile below to browse the various types of annual reports, including updated reports for 2020. (9/8/2021)
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Visit our Open Data site for data services and downloads. Click on the Open Data tile below to browse the datasets. (8/27/2021)
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