Construction-Related Travel Impacts

Sugarloaf Road Culvert Replacement at Betasso Road Starts in August – Expect travel delays

Two culvert replacements on Sugarloaf Road at Betasso Road will require lane closures and the installation of a temporary 3-way traffic signal, which will result in travel delays. Work is anticipated start on Aug. 5 and last into November 2025. Access to Betasso Preserve will be maintained.

City of Boulder 63rd Street Waterline Replacement – FULL CLOSURE OF 63rd/61st Street between Jay Road and Andrus Road in place through February 2026

The City of Boulder is conducting a waterline replacement project that will have several traffic impacts through 2025 and into 2026. Please view the City of Boulder’s project webpage for specific information.

CDOT CO 119/Diagonal Highway Safety, Mobility, and Bikeway Construction – UNDERWAY – Expect significant travel impacts

CDOT is currently working on this project, which will require significant travel impacts on CO 119/Diagonal Highway between Boulder and Longmont. This project is anticipated to be completed in the Spring of 2027.

Project Hotline – 720-378-8083
Project Email – co119safetyandmobility@gmail.com
Visit CDOT’s CO 119 project Webpage to learn more and to subscribe to the project email list

HELPFUL LINKS

• • Special Event Permit Requests – Pending and Approved taking place throughout Boulder County
  • Utilize CDOT’s COtrip.org website to see real time traffic condition updates on state highways
  • Learn about road closures in the City of Boulder
  • City of Boulder Live Traffic Cameras
  • Learn about road closures in Longmont
  • Learn about road closures in Lafayette
  • Learn about road closures in Louisville
  • Learn about road closures in Erie

For more information about Boulder County road travel impacts, please contact – Andrew Barth at abarth@bouldercounty.gov or call 303-441-1032

View the Roadway Travel Impacts Map to see locations of the projects listed above.