I-25 North Express Lanes

The expansion of I-25, by Colorado Department of Transportation (CDOT), with an Express Lane in each direction, will provide trip reliability, safety improvements and more for Northern Colorado. 

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.

I-25 and CO 402 Interchange Grand Opening
The I-25 and CO 402 interchange officially opened to traffic on Friday, Oct. 18, following the grand opening event celebrating the new bridge that crews built aboveI-25 and three roundabouts, marking the end of the 120-day project, funded withhelp of Johnstown, Loveland, Weld and Larimer Counties. 

Mayor Gary Lebsack and other state and local dignitaries addressed thecrowd and the importance of projects like these the provide better infrastructurefor our rapidly growing region.

402 Interchange Grand Opening 1 (Photo Credit: Nikki A. Rae Photography. Nikki A. Rae Photography retains the copyright to the images. Images cannot be used in advertising, contests, or for financial gain without written approval.)

-- (9/29/19) ---

Starting Sunday, Sept. 29, CDOT began construction on the I-25 North: Berthoud to Johnstown Express Lanes Project, the next phase of improvements along I-25 in northern Colorado. Construction will start with reconstructing the southbound I-25 bridge over Little Thompson River, as well as elongating the southbound on-ramp from Colorado Highway 56 to allow for a safer merge. 

The full closure of eastbound and westbound Colorado Highway 402 from the southbound I-25 on- and off-ramps to the new East Frontage Road is ongoing as crews continue daytime and nighttime bridge construction, lighting and cable rail installation, drainage work and landscaping, and signage operations at the future roundabouts and ramps. Crews will also conduct paving operations on I-25 mainline and shoulders at CO 402. 

A full closure of the southbound I-25 on-ramp from CO 392 will be required on Sunday, September 29, 9 p.m. to 5 a.m. to perform earthwork operations.  On-ramp traffic will detour on northbound on I-25 to Harmony Road, and back onto southbound I-25.

Crews will require full closures of the southbound I-25 on- and off-ramps at CO 402 for striping operations. SB off-ramp traffic will detour to Exit 252 CO 60 East, turn west onto CR 48, then north on CR 7 back to CO 402. SB on-ramp traffic will detour south on County Road 7 then east on CR 48 to the southbound I-25 on-ramp. 

Work on the new Prospect Road bridge over I-25 continues with abutment work. In order to set girders on the new Prospect Road bridge over I-25, a full closure of northbound and southbound I-25 at Prospect Road and a full closure of Prospect Road over I-25 will be in place on Tuesday, Oct. 8 and Wednesday, Oct. 9 from 9 p.m. to 5 a.m.

On Thursday, Oct. 10 and Sunday, Oct. 13, a full closure of northbound and southbound I-25 at Prospect Road will be in place from 9 p.m. to 5 a.m. to form the deck of the new Prospect Road Bridge over I-25.  All I-25 on- and off-ramps will remain open during the deck forming operation. Westbound Prospect Road traffic will be detoured north to Mulberry Street. Eastbound Prospect Road traffic will be detoured south to Harmony Road and I-25 traffic will be detoured using the on- and off-ramps at Prospect Road.

For specific lane closures and traffic impacts from Sunday, Sept. 29 - Saturday, Oct. 5, please use this interactive map on the project webpage. To display full details on the traffic impacts, please click on any of the color shaded areas on the map to see full details. A pop-up on the left side of your screen will outline the details of the lane closures.

Construction activities are weather dependent and subject to change. Please watch for construction vehicles entering and exiting mainline I-25 and obey all posted signage in construction zones. Your safety and the safety of our crews is our highest priority.

The I-25 North Express Lanes Project provides a Courtesy Patrol during commute hours (6 to 9 a.m. and 3:30 to 6:30 p.m.) to assist with disabled vehicles within the Project limits from Johnstown to Fort Collins.

To stay up-to-date on construction information and keep yourself informed on I-25 North Express Lanes: Johnstown to Fort Collins Project news, call the Project hotline at 720-593-1996 or sign up for emails at northi25expresslanes@gmail.com.

More information about this project is available at: