Next phase of work to begin on the I-25 North Express Lane Project

March 22, 2019 - Overnight lane closures scheduled to begin March 24  

ADAMS AND BROOMFIELD COUNTY — Crews will resume work this month on the Interstate 25 North Express Lane Project, between 112th Avenue and Northwest Parkway/E-470.  When completed, the improvements will reduce congestion, enhance safety and provide reliable travel options along this busy stretch of highway connecting downtown Denver to major growth in northern Colorado.

Work has been done to widen this section of I-25 by one lane in each direction, which will operate as an Express Lane. The next phase of work will resurface the pavement with new asphalt, install  concrete median barrier and lighting, make technology improvements, and install tolling infrastructure for the new Express Lanes.

The Colorado Department of Transportation contracted with Graham Contraction Ltd. on this phase of work.   The project is scheduled for completion spring/summer of 2020.

Map showing project location:


Lane closures week of March 24th:

There will be double lane closures on southbound I-25 between CO 7 to 120th Ave. from 9:30 p.m. to 5:30 a.m. Sunday, March 24 to Friday, March 29.  There will be no overnight lane closures on Saturday, March 30. During the day motorists can expect intermittent shoulder closures.

Throughout the project, motorists should expect:

  • Various overnight lane closures from 9:30 p.m. to 5:30 a.m. during the weekdays and from 9:30 p.m. to 9 a.m. during the weekends.

  • Daytime median work to occur Mondays through Fridays, from 7 a.m. to 4 p.m. Work to occur behind barriers.

  • Intermittent shoulder closures during daytime hours.

  • Traffic Switches.

  • Narrower lanes.

  • Speed limit reduced to 55 mph in the construction work zone.


Motorists are urged to:

  • Obey the slower speed limit in the work zone.

  • Be extra vigilant as the drive in the construction zone for narrower lanes and traffic switches.

  • Give ample space between their vehicle and the one ahead.

  • Watch for construction crews and other emergency personnel.

  • Not to drive distracted - no texting and driving.

  • Drive sober!


  • 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, sign up for GovDelivery, or call 511. Updates are also available via Twitter @coloradodot and CDOT’s Facebook page at

ABOUT CDOT: CDOT has approximately 3,000 employees located at its Denver headquarters and in regional offices 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, and administers Bustang, the state-owned and operated inter-regional express service.  Governor Jared Polis has charged CDOT to further build on the state’s inter-modal mobility options.