Construction Begins on North I-25 Express Lanes Extension to NW Pkwy/E-470

July 7, 2016 - Denver Metro Colorado/CDOT Region 1 - Project starting summer 2016 through winter 2018

THORNTON – This week, the Colorado Department of Transportation (CDOT) began a $97.5 million project along the North I-25 corridor from 120th Avenue to Northwest Parkway/E-470, in an effort to improve safety, capacity and 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 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 SH 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 and 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,” said Paul Jesaitis, CDOT Region 1 Transportation Director. “Ultimately, this project will positively impact so many motorists, providing benefits to local businesses, neighborhoods as well as through traffic. We’re so excited to get started.”

 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 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 Country would like to thank motorists for their patience during construction and remind drivers to slow down in the cone zone.

 This $97.5 million project was funded in part through collaboration with Responsible Acceleration of Maintenance (RAMP), CDOT Region 1 Surface Treatment, Highway Safety Improvement Program (HSIP), CDOT Water Quality Mitigation Fund and a loan secured by CDOT’s High Performance Transportation Enterprise.

 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 Ave. 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, To get an ExpressToll account and pass, visit

 Stay Informed:  For updates on this project, the public may call 720-737-5118 or email [email protected]. Major CDOT project updates are also available via, Twitter @coloradodot or Facebook.