Projects

Traffic Impacts

All work is weather dependent and will be rescheduled if operations cannot be completed.

Upcoming Full closures: I-25 at Prospect Road and Prospect Road over I-25

Full closures of I-25 at Prospect Road and of Prospect Road over I-25 are required to set girders on the new Prospect Road bridge. These closures will be in effect from 9 p.m., Monday, until 5 a.m., Tuesday, and again from 9 p.m., Tuesday, until 5 a.m., Wednesday.

  • Westbound Prospect Rd traffic will be detoured north on I-25 to Exit 269/Mulberry Street and back onto southbound I-25 to Exit 268/Prospect Rd.
  • Eastbound Prospect Rd traffic will be detoured south on I-25 to Exit 265/Harmony Road and back onto northbound I-25 to Exit 268/Prospect Rd. I-25 traffic will be detoured up and over I-25 using the on- and off-ramps at Exit 268/Prospect Rd.
  • View detour maps.

Work this Week
August 2-8

Lane closures for the week of August 2-8:

  • Monday – Tuesday: Nighttime full closure of I-25 at Prospect Rd. 
  • Monday – Saturday: Daytime flagging operations project-wide. 
  • Tuesday - Wednesday: Nighttime northbound and southbound I-25 on-ramps from westbound US 34 full closures. 
  • Tuesday: Nighttime southbound I-25 off-ramp to US 34 full closure. 
  • Tuesday, Thursday - Friday: Nighttime eastbound and westbound US 34 single lane closures over I-25.
  • Wednesday: Nighttime northbound I-25 on- and off-ramp at CO 392 full closures. 
  • Wednesday: Nighttime northbound I-25 single lane closures from Crossroads Blvd. to CO 392. 
  • Thursday – Friday: Nighttime eastbound and westbound US 34 on-ramp to northbound I-25 full closures. 
  • Friday: Nighttime I-25 single lane closures from CO 392 to Prospect Rd. 

Long-term closures

  • Sat, Mar. 7 - Sept. 2020: FULL CLOSURE of County Road 20 Bridge over I-25 for bridge reconstruction and widening (Starting at 6 a.m. Saturday)
  • Mon, Mar. 9 - Aug. 2020:  Southeast Frontage Road closed between Lucy Lane and the Great Western Railroad tracks for frontage road bridge and frontage road reconstruction

Extended Closures

 I-25 frontage road (WCR 44 to Valley Road intersection) near the Berthoud exit - PERMANENTLY CLOSED

On July 27, the eastern I-25 frontage road between Weld County Road 44 and the intersection of Valley Road closed permanently to allow crews to safely realign I-25 at the CO 56 intersection and improve the intersection altogether. In the long term, this closure will allow for the expansion and additional lanes on I-25 North.

Through access will no longer be available. Additionally, the Berthoud Park and Ride will close for approximately one week beginning July 27. The lot will be temporarily relocated to a site accessed from Weld County Road 44 before it is relocated to its final site. Please follow posted signage in the area and plan accordingly.

Construction is weather-dependent and subject to change.

Park and Ride Locations

East Frontage Road (Prospect Rd to Mulberry St) - PERMANENTLY CLOSED

I-25-ClosureMap_200612.jpg

Extended Closure of Larimer County Road 20 Bridge over I-25

The I-25 North Express Lanes Johnstown to Fort Collins Project has closed Larimer County Road 20 Bridge over I-25 until September 2020 to reconstruct and widen the bridge.

Extended closure of the Southeast Frontage Road between
Lucy Lane and the Great Western Railroad Crossing

The Southeast Frontage Road between Lucy Lane and the Great Western Railroad Crossing will be closed until August to reconstruct the Southeast Frontage Road and the Frontage Road Bridge over the Big Thompson River.

I-25 North Frontage Road near Berthoud now permanently CLOSED

The I-25 frontage road between Colorado Highway 56/Weld County Road 44 to WCR 46 is now permanently closed. This closure is the first phase of a larger frontage road closure plan. All properties and utility companies will have access maintained to their property.

The frontage road between Larimer County Road 14 and Colorado Highway 402 remains in place due to the number of business accesses.

Updated Jan. 6 Alternative Routes Map

Click the button below to view CDOT’s I-25 Frontage Road Vision.


Colorado: The Official State Web Portal