Two upcoming long-term closures of the northbound Colorado Boulevard on-ramp to westbound I-70

News Release

August 26, 2020 - Denver Metro Area, Colorado - Closures will help expedite construction of the new Colorado Boulevard bridge

As part of the Colorado Department of Transportation’s Central 70 Project, motorists should expect two separate long-term closures of the northbound Colorado Boulevard on-ramp to westbound Interstate 70. The first closure will start on Aug. 31 and will go through Sept. 4. The second closure will be in place for two weeks from Sept. 8 to Sept. 23. The gap between the two closures allows for open roadways over the Labor Day weekend.

This work is required to build the center pier for the new widened Colorado Boulevard bridge structure over I-70 which will have three through-lanes and double-turn lanes in each direction. Implementing these full closures will allow the Project team to build the new Colorado Boulevard bridge approximately five months ahead of schedule compared to if the ramp stayed open during daytime hours and was only closed intermittently overnight. 


  • Northbound Colorado Boulevard on-ramp to westbound I-70 full closure – 8 p.m., Monday, Aug. 31, to 5:30 a.m., Friday, Sept. 4. 

  • Northbound Colorado Boulevard on-ramp to westbound I-70 full closure – 8 p.m., Tuesday, Sept. 8, to 5:30 a.m., Wednesday, Sept. 23. 

  • Motorists should use 46th North Avenue as an alternate route to access the westbound I-70 on-ramp at Steele/Vasquez.

This work is weather dependent and subject to change. 

Detour map:

Colorado to WB I-70 Map


Safe transportation infrastructure is essential for all of us, particularly for emergency first responders and freight drivers as Colorado navigates the COVID-19 pandemic. With that in mind, CDOT maintenance and construction crews  follow social distancing and other health safety measures to reduce COVID-19 exposure on the worksite. The Colorado Department of Public Health and Environment announced guidelines for construction activities. The public is urged to join the campaign for #DoingMyPartCO by practicing social distancing and wearing face masks. As traffic returns to normal levels, motorists must drive cautiously and heed the speed limit so all of us can return home safely. 

Whole System.Whole Safety 

Earlier this year, CDOT announced its Whole System — Whole Safety initiative to heighten safety awareness. This initiative takes a systematic, statewide approach to safety combining the benefits of CDOT’s programs that address driving behaviors, our built environment and the organization's operations. The goal is to improve the safety of Colorado’s transportation network by reducing the rate and severity of crashes and improving the safety of all transportation modes. The program has one simple mission—to get everyone home safely.


About the Central 70 Project

The Central 70 Project will reconstruct a 10-mile stretch of I-70, add one new Express Lane in each direction, remove the aging 56-year-old viaduct and lower the interstate between Brighton and Colorado boulevards. More information on the Project, including a list of the Project’s community commitments, are available at


Stay Informed

  • Text Alerts - Text Central70 to 77948

  • Email Updates - Sign up for Project updates at 

  • Website - - Traffic Impacts page 

  • Watch progress on the webcam