Weekend-long single lane and ramp closures on I-25 at 136th Avenue for bridge deck repair

October 9, 2019 - Metro Denver Area, Colorado

THORNTON, CO — As part of the North Interstate 25 Express Lanes: 120th Avenue to Northwest Parkway/E-470 project, crews will require weekend-long single lane and ramp closures on I-25 at 136th Avenue for deck repairs on the bridge over Big Dry Creek in Thornton. Overnight, motorists can expect double lane closures for both bridge work and paving along northbound and southbound I-25.

Traffic Impacts

9 p.m. on Friday, Oct. 11, to 5:30 a.m. on Monday, Oct. 14 – 2,000-foot single left lane closures on northbound and southbound I-25 at 136th Avenue and full closure of 136th Avenue on-ramp to southbound I-25 for bridge deck repair. During the day, two lanes of traffic will remain open. Motorists can detour around the 136th Avenue on-ramp to southbound I-25 using either Huron or Washington streets to the 120th Avenue on-ramp to southbound I-25. Overnight, crews will require double lane closures for both bridge work and paving, keeping one lane of travel open.

This work is critical to complete prior to colder temperatures occurring overnight. All work is weather dependent and subject to change.


  • Add capacity with one Express Lane in each direction.
  • Provide travelers with the choice of taking the general-purpose lanes for free or driving the Express Lanes for a faster trip in exchange for a variable toll - the Express Lanes will be free to vehicles with three or more people.
  • Build an auxiliary lane along northbound I-25 connecting the 136th Avenue on-ramp to the 144th Avenue off-ramp, helping drivers merge more comfortably between the two interchanges.
  • Resurface the roadway which will improve driving conditions.
  • Address necessary drainage and utility improvements along the corridor.


For additional information about this project, call the project information line at (303) 339-0225, email the team at [email protected], or visit the 

I-25 North Express Lanes project website and sign up for updates. For information on travel conditions visit COTrip.org, sign up for GovDelivery, or call 511. Updates are also available via Twitter @coloradodot and CDOT’s Facebook page at Facebook.com/coloradodot.



The following tips are to help you stay safe while traveling through maintenance and construction work zones.

  • Do not speed in work zones. Obey the posted speed limits.
  • Stay Alert! Expect the unexpected.
  • Watch for workers. Drive with caution.
  • Don't change lanes unnecessarily.
  • Avoid using mobile devices such as phones while driving in work zones.
  • Turn on headlights so that workers and other drivers can see you.
  • Be especially alert at night while driving in work zones.
  • Expect delays, especially during peak travel times.
  • Allow ample space between you and the car in front of you.
  • Anticipate lane shifts and merge when directed to do so.
  • Be patient!



To heighten safety awareness, CDOT recently announced its Whole System — Whole Safety initiative. This project 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.



CDOT has approximately 3,000 employees located throughout Colorado, and manages more than 23,000 lane miles of highway and 3,429 bridges. CDOT also manages grant partnerships with a range of other agencies, including metropolitan planning organizations, local governments and airports. It also administers Bustang, the state-owned and operated interregional express service. Governor Polis has charged CDOT to further build on the state’s intermodal mobility options.