Reconstruction of the Prospect Road and I-25 interchange requires CDOT to redirect traffic over four nights starting Oct. 8

October 3, 2019 - Northeastern Colorado

FORT COLLINS  In order to set girders on the new Prospect Road bridge over I-25, traffic on I-25 and Prospect will have to be redirected over four nights.

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.

In alignment with the Whole System Whole Safety campaign being utilized by CDOT across its portfolio of projects, these closures are necessary to protect motorists from potential danger posed by overhead work and equipment staged on the roadway as they travel along I-25.

In alignment with CDOT’s Whole System Whole Safety program, these detours are necessary to protect motorists from potential danger posed by overhead work and equipment staged on the roadway as they travel along I-25.

Detour Information

Westbound Prospect Road traffic will be detoured north to Mulberry Street

Eastbound Prospect Road traffic will be detoured south to Harmony Road

I-25 traffic will be detoured up and over I-25 using the on- and off-ramps at Prospect Road

Project Information 

The I-25 North Express Lanes: Johnstown to Fort Collins Project will increase capacity by adding an Express Lane in both directions, constructing inside and outside shoulders, and replacing aging bridges. The project will also improve multimodal access to regional transit to promote mode shift, improve bus service performance by adding new bus slip ramps from I-25 to the new Park-n-Ride at Kendall Parkway, and improve interchanges at CO 402, Prospect Road and US 34.


The following tips are to help you stay safe while traveling through maintenance and construction work zones.

  • Do not speed in work zones. Obey the posted speed limits.

  • Stay Alert! Expect the unexpected.

  • Watch for workers. Drive with caution.

  • Don't change lanes unnecessarily.

  • Avoid using mobile devices such as phones while driving in work zones.

  • Turn on headlights so that workers and other drivers can see you.

  • Be especially alert at night while driving in work zones.

  • Expect delays, especially during peak travel times.

  • Allow ample space between you and the car in front of you.

  • Anticipate lane shifts and merge when directed to do so.

  • Be patient!



To heighten safety awareness, CDOT recently announced its Whole System — Whole Safety initiative. This project takes a systematic statewide approach to safety combining the benefits of CDOT’s programs that address driving behaviors, our built environment and the organization's operations. The goal is to improve the safety of Colorado’s transportation network by reducing the rate and severity of crashes and improving the safety of all transportation modes. The program has one simple mission—to get everyone home safely.



CDOT has approximately 3,000 employees located 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. It also administers Bustang, the state-owned and operated interregional express service. Gov. Polis has charged CDOT to further build on the state’s intermodal mobility options.