I-25 North Express Lanes: Berthoud to Fort Collins

Project Open House

With the start of construction scheduled to begin this fall, the Colorado Department of Transportation (CDOT) is inviting the public to learn more about the I-25 North Express Lanes project between Berthoud and Johnstown  - including expected construction impacts – at an open house next week: 

Tuesday, Aug. 13

5-7 p.m. 

Southwest Weld County Building (the Del Camino Conference Room)

4209 CR 24 ½ 

Longmont, CO 80504

This will be an open-house style event — there will not be a formal presentation. Attendees can visit any time between 5 and 7 p.m. to talk one-on-one with project experts. There will be multiple display boards explaining the project and plenty of staff available to answer questions. 

For ADA accommodations, please call the project hotline – 720-593-1996– 48 hours ahead of the meeting.


I-25-CO 402 interchange closure 

By the end of 2019, the I-25/CO 402 interchange will undergo substantial changes, resulting in a new-and-improved interchange. To support reconstruction, crews have closed both directions of CO 402 under I-25.

The closure extends from the southbound I-25 on- and off-ramps to the new Southeast Frontage Road. Once completed in October, the new configuration at CO 402 will be fully operational, and future impacts at this interchange will be minimal.  

Stay updated on all project information by joining our mailing list or contacting us, or by calling the project hotline, 720-593-1996.

Work this Week

Lane closures from Sunday, Aug. 11 through Saturday, Aug. 17:  

  • Sunday – Tuesday: Southbound CO 402 on-ramp closure
  • Sunday – Wednesday: Nighttime southbound I-25 single lane closures north of US 34
  • Monday – Saturday: Daytime flagger assistance on the northbound I-25 on-ramp from CO 392.
  • Monday – Saturday: Daytime flagger assistance on CO 402 east and west of I-25.
  • Wednesday – Friday: Southbound I-25 left lane closures south of CO 402
  • Thursday – Nighttime northbound and southbound left lane closures on I-25 at CO 392
  • Thursday – On- and-off-ramp closures at CO 392

Gov. John Hickenlooper broke ground on the I-25 North Express Lanes project Monday, Sept. 10, 2018. He was joined by Sen. Michael Bennet and many local, state and federal officials who helped make this project a reality.

Project Facts

  • Cost: $300+ million
    The U.S. Department of Transportation (USDOT) has awarded CDOT and local partners a TIGER grant to help it fund this expansion of I-25 North.
  • Contractor: Kraemer and IHC Construction Companies, LLC
  • Timeline:
    • First Notice to Proceed: Early 2018
    • Second Notice to Proceed: Summer 2018
    • Construction: Fall 2018 through fall 2019
    • Construction Complete/Toll Commencement: Early 2022

In mid-October, crews began construction near CO 402. There will be three main phases of work in this area that will continue through mid-2020:

  • Phase 1 will allow crews to build temporary infrastructure on the southbound side of I-25.

  • Phase 2 will push northbound traffic onto the southbound side to provide access to build infrastructure on the northbound side.

  • Phase 3 will switch northbound and southbound traffic onto the northbound side to allow crews to build the required infrastructure on the southbound side.

What to Expect

  • While most of the work will be performed outside the roadway, some nighttime lane closures will be required. CDOT will send advance notification of these closures.
  • Current work between Crossroads Boulevard and Kechter Road, near CO 392, will continue during construction at CO 402.

Coming Up....

  • Once the project is complete, CO 402 will run over I-25.

Key Project Features

  • Increase capacity by adding an Express Lane in both directions, replacing four aging bridges and widening four additional bridges.
  • Improve multi-modal access to regional transit to promote mode shift.
  • Improve bus service performance and reduce each total trip time by 15 minutes by adding new bus slip ramps from I-25 to the new Park-n-Ride at Kendall Parkway.
  • Create new pedestrian, bicycle access under I-25 at Kendall Parkway.
  • Connect the Cache la Poudre River Regional Trail under I-25 and network to 100 miles of total trails. It will also serve as a wildlife corridor.

This project brings critically important benefits to the economy, the environment and quality of life by leveraging resources from partners across northern Colorado. Benefits include:

  • safety improvements;
  • reducing accidents and fatalities;
  • reducing travel time and increasing trip reliability;
  • reducing emissions;
  • improving freight efficiency;
  • increasing travel choices;
  • reconstructing aging and obsolete infrastructure;
  • improving bike/pedestrian and transit connectivity; and
  • employing congestion management and safety technology to improve overall conditions.

Local partners and elected officials have been heavily involved in the planning, implementation and funding of this critically important project.

In 2013, an I-25 Coalition was formed to help manage and accelerate improvements to the corridor. Six northern Colorado communities, Weld and Larimer counties, CDOT, chambers of commerce and private businesses have all been collaborating to help bring these improvements to fruition.

The I-25 Coalition has grown steadily and is currently made up of 90 representatives from Adams, Larimer and Weld counties, Berthoud, Broomfield, Dacono, Erie, Firestone, Fort Collins, Frederick, Johnstown, Loveland, Mead, Northglenn, Timnath, Thornton and Windsor, as well as CDOT, businesses and other interested agencies.

Contact Us

Work Area


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