CDOT designing north I-25 upgrades

The Colorado Department of Transportation has begun designing $670 million in improvements for Interstate 25 in Northern Colorado, though none of the projects may be completed until 2035.

The department selected three projects as part of its Phase 1 of improvements: 

  • Tolled express lanes will be built in each direction of the interstate between State Highway 56 in Berthoud and State Highway 66 in Longmont as well as between 120th Avenue and U.S. 36. That will connect to the existing interstate express lane to downtown Denver.
  • Six interchanges along I-25 will be upgraded, including State Highway 14, Prospect Road, U.S. 34, State Highway 56, Weld County Road 34 and State Highway 7. Phase 1 also includes the construction of an interchange at U.S. 34 and Centerra Parkway.
  • The interstate between State Highway 14 and State Highway 392 will be reconstructed and widened to add continuous acceleration and deceleration lanes that will ultimately become part of an eight-lane configuration.

The department of transportation has no funding for the projects, but has decided to design them anyway. It’s unknown when construction could begin.

“We’ve learned in the past that it does help to have things shelf-ready,´ said Ashley Mohr, spokeswoman for the transportation department.

Updates will be posted on the project’s website,

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