Upcoming Traffic Impacts to Northbound I-25 Off-Ramp and Northwest Parkway/E-470

December 28, 2017 - Denver Metro Colorado/CDOT Region 1

ADAMS COUNTY – As part of the North I-25 Express Lanes: 120th Avenue to Northwest Parkway/E-470 project, the Colorado Department of Transportation and contractor partner, Hamon Infrastructure, will require an overnight northbound I-25 off-ramp closure at 136th Avenue in order to install safety-critical barrier. Additionally, crews will temporarily shorten the acceleration lane from the southbound Northwest Parkway/E-470 on-ramp to I-25.

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


·         Wednesday, Jan. 3, 2018 – 8 p.m. to 5:30 a.m. – Full closure of the northbound I-25 off-ramp to 136th Avenue: To detour around this closure, motorists traveling on northbound I-25 will exit at 120th Avenue, proceed east to Washington Street, then turn north on Washington Street to reach 136thAvenue.

·         Thursday, Jan. 4, 2018 – 7 p.m. to 5:30 a.m. – Temporary shortening of the acceleration lane from southbound Northwest Pkwy/E-470 to I-25. Motorists will instead have to yield onto I-25. Caution is advised.

Project Background

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 Monday through Friday7 a.m. to 4:30 p.m. 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 www.codot.gov/programs/expresslanes. To get an ExpressToll account and pass, visit www.expresstoll.com.

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

Project Information

 For additional information about this project, call the information line at 720-737-5118, email the team at i25northconstruction@gmail.com, or visit the project website at www.codot.gov/projects/north-i-25/NorthI-25/120thNorth. For information on travel conditions, visit www.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.