Crews to Close Northwest Parkway/E-470 On-Ramps to Southbound I-25 Jan. 22-23

Jan. 19, 2018 -

ADAMS COUNTY  Crews will close the westbound and eastbound Northwest Parkway/E-470 on-ramps to southbound Interstate 25 to perform ramp detour work. Additionally, crews will require a short-term closure of the pedestrian tunnel under I-25 at 120th Avenue to complete concrete sidewalks.

Motorists should plan to add an additional 10 minutes to their travel time to detour around the closures. All work is weather permitting and subject to change.


  • 9 p.m. Monday, Jan. 22 to 5:30 a.m. Tuesday, Jan. 23 - Full closure of the westbound E-470 and eastbound Northwest Parkway on-ramps to southbound I-25: 
  • To detour around this closure, motorists traveling on westbound E-470 and eastbound Northwest Parkway should enter northbound I-25 and travel north to Colorado Highway 7, then travel west to enter southbound I-25. See attached detour map. 

NOTE: If work is unable to occur due to winter weather, the ramp closure will take place on Tuesday, Jan. 23, from 9 p.m. to 5:30 a.m.

  • 1-4 p.m. Friday, Jan. 26 – 1 p.m. to 4 p.m. – Pedestrian tunnel under I-25 closed at 120th Avenue to complete concrete sidewalks
  • To detour around this closure:
    • Westbound Trail Detour - To access the trail from westbound Community Center Drive, travel north to Grant Street, west to 120th Avenue, and south to Delaware Street and rejoin the trail at the RTD Wagon Road Park-n-Ride. 
    • Eastbound Trail Detour - To access the trail from the RTD Wagon Road Park-n-Ride, travel north to Delaware Street, east to 120th Avenue and south to Grant Street to rejoin the trail.


The North I-25 Express Lanes project from 120th Avenue to Northwest Parkway/E-470 is a $97.5 million project that will improve safety, capacity and user choice to a rapidly developing region.  

This project will continue the previous Express Lanes project, which was completed on I-25 between US 36 and 120th Avenue, and will extend the Express Lanes to Northwest Parkway/E-470. The project will add capacity on I-25 up to Northwest Parkway/E-470 and construct a new asphalt surface from 120th Avenue to Colorado Highway 7. Motorists can expect the roadway to be in its final alignment by early 2019. 

Construction will take place from 7 a.m. to 4:30 p.m. Monday through Friday, with periodic night and weekend work. Motorists can expect various lane closures on both NB and SB I-25 as well as periodic ramp closures. Traffic will be maintained during peak travel times throughout construction.

About Express Lanes: Express Lanes increase roadway capacity and help to manage congestion on the highways. The use of toll pricing during peak travel times reduces delays, manages congestion and maintains reliable travel times. Express Lanes currently are open between 120th Avenue and US 36 on North I-25 and, US 36 from Denver to Boulder and on the I-70 Mountain Express Lane. For more information, visit To get an ExpressToll account and pass, visit

Ways to Commute: Smart Commute Metro North is offering some incentives to help you commute smarter! Visit for more information.


For additional information about this project, call the information line at 720-737-5118, email the team at [email protected], or visit the project website at For information on travel conditions, visit, sign up for GovDelivery, or call 511. Updates are also available via Twitter @coloradodot and CDOT’s Facebook page at

E-470 Detour Map 1.14.18.pdf (2).png120th Ped Tunnel Detour (1).jpg