Upcoming closures of I-25 at 144th Avenue

February 6, 2017 - Denver Metro Colorado/CDOT Region 1

THORNTON – On Monday ,Feb. 6 at 11:45 p.m. until Tuesday, Feb. 7 at 5:30 a.m., northbound Interstate 25 will be closed at 144th Avenue for work on a box culvert that extends underneath I-25.

A new traffic alignment will be in place Tuesday morning at 5:30 a.m. and will shift traffic to the shoulder of I-25 to allow for construction in the center of the interstate. Motorists should expect this configuration to last until spring 2017.

An overnight closure of southbound I-25 at 144th Avenue is scheduled for Tuesday, Feb. 7 at 11:45 p.m. untilWednesday, Feb. 8 at 5:30 a.m. for work on the box culvert and to place a new traffic alignment on the southbound lanes. The southbound lanes will also shift to the shoulder to allow for construction in the center of the interstate. Dates are subject to change based on weather conditions.

Detour routes will be posted and are listed below.  


Northbound I-25 will exit at 144th Avenue and take the 144th northbound entrance ramp to rejoin I-25.

Southbound I-25 will exit at 144th Avenue and take the 144th southbound entrance ramp to rejoin I-25.  


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 the Northwest Parkway/E-470. The project will add capacity on I-25 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 winter 2018.

“I-25 plays a critical role in the quality of life and economic vitality in the growth of northern Colorado,” said Paul Jesaitis, CDOT Region 1 Transportation Director. “This stretch is one of the most congested portions of highway in the Denver metro area, seeing an average daily traffic volume of 174,000 vehicles per day. Ultimately, this project will positively impact so many motorists, providing benefits to local businesses, neighborhoods as well as through traffic.”

Construction will take place Monday through Friday, 7:00 a.m. to 4:30 p.m. with periodic night and weekend work. Motorists can expect various lane closures throughout the project on both northbound and southbound I-25 as well as periodic ramp closures. Traffic will be maintained during peak travel times throughout construction. 

CDOT, Hamon Infrastructure, the City of Westminster, the City and County of Broomfield, the City of Northglenn, the City of Thornton and Adams County would like to thank motorists for their patience during construction and remind drivers to slow down in the cone zone.

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 provides an option for travelers, reduces delays, manages congestion and maintains reliable travel times. HOV3/Express Lanes currently are open from Downtown Denver to 120th Avenue on North I-25 and, US 36 from Denver to Boulder and on the I-70 Mountain Express Lane. For more information, visit codot.gov/programs/expresslanes. To get an ExpressToll account and pass, visit expresstoll.com.

Ways to Commute: Smart Commute Metro North is offering some incentives to help you commute smarter! For more information or to sign up, check out smartcommutemetronorth.org

Stay Informed: For additional information about this project, call the project information line at 720-737-5118, email the team at [email protected]. For information on travel conditions, visit CoTrip.org, or call 511. Updates are also available via Twitter @coloradodot and CDOT’s Facebook page at Facebook.com/coloradodot.