Overnight full closures coming on North I-25 Express Lanes project between 104th Ave. and Northwest Pkwy/E-470

September 16, 2019 - Denver Metro Area, Colorado


THORNTON, CO — Work on the North Interstate 25 Express Lanes: 120th Avenue to Northwest Parkway/E-470 project continues as crews perform overhead sign installation and paving operations—making significant progress on the project. This work will require the following major impacts to the highway:

Full closures for overhead sign installation

Work hours: Sundays through Thursdays, from 9:30 p.m. to 5:30 a.m.

Anticipated Schedule (weather dependent and subject to change):

  • September 16, 18 and 19: Northbound I-25 closures
  • September 17, 22 and 23, with a potential closure on 9/24: Southbound I-25 closures

Impacts: 6 nights of full closure of a single direction of I-25 for up to two miles.

Description: Between September 16-24, 2019, motorists can expect six nights of intermittent full closures in a single direction of I-25. The general public will detour around these closures using Huron Street to the west of the highway and Washington Street to the east. Commercial vehicles will detour southbound at Colorado Highway 7 to US Highway 287 and northbound at Colorado Highway 44 to US Highway 85.

Double lane closures for paving operations

Work hours: Sundays through Thursdays, from 9:30 p.m. to 5:30 a.m.; Fridays from 9:30 p.m. to 9 a.m.

Impacts: Double lane closures on both directions of I-25.

Description: Paving operations, which began earlier this summer 2019, will continue on I-25 between Northwest Parkway/E-470 and 104th Avenue. Motorists can expect to drive on a milled surface—please slow down and keep a safe following distance between you and the vehicle in front of you. This work will ultimately deliver a smoother riding surface for all motorists, in addition to the Express Lane in each direction.

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.