Traffic Impacts

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

Construction Activities & Impacts

Work this Week
Sept. 17 - 23

Lane closures for the week of Sept. 17:

  • Thursday: Overnight traffic switch between CO 402 and CO 56.
  • Thursday: Overnight I-25 ramp closures at CO 60 and CO 56.
  • Sunday through Friday: Single lane closures on I-25 between US34 and Mulberry Road.
  • Tuesday through Friday: Daytime single lane closures on southbound I-25 between Mulberry Street and Prospect Road. 

  • Tuesday, Thursday and Friday: Intermittent full closures of the southbound I-25 on-ramp from Prospect Road.

  • Sunday through Thursday: Intermittent full closures of the southbound I-25 on-ramp from eastbound Mulberry Street and off-ramp to Prospect Road.

  • Monday, Thursday and Friday: Intermittent full closures of the northbound I-25 off-ramp to Prospect Road.

  • Sunday to Monday: Full closure of the northbound I-25 on-ramp from Harmony Road. 

  • Friday to Saturday: Full closure of southbound I-25 from Mulberry Street to Harmony Road.

Berthoud to Johnstown

The following impacts scheduled for Sept. 14 are rescheduled for Thursday, Sept. 21:
There will be temporary full closures of the southbound I-25 on-ramp from Colorado Highway 60/Weld County Road 48, and southbound I-25 off-ramps to Colorado Highway 56 and CO 60/WCR 48 for a traffic switch and to allow crews to paint new lane striping and relocate barriers.

  • Traffic switch: 9 p.m. - 5 a.m., southbound I-25 left lane closure shifting to right lane
    between Colorado Highway 402 and CO 56.
  • Southbound I-25 on-ramp closure at CO 60, 7 p.m. - 5 a.m.
    • Traffic intending to travel south will take northbound I-25 to exit 255, turn east on CO 402, and enter southbound I-25.
  • Southbound I-25 off-ramp closure at CO 56, 9 p.m. - 5 a.m.
    • Traffic intending to exit at Berthoud will continue southbound on I-25 to exit 245, turn east on Weld County Road 34, and travel north on I-25 to exit 250.
  • Southbound I-25 off-ramp closure at CO 60, 9 p.m. - 5 a.m.
    • Traffic intending to exit at Johnstown will continue southbound on I-25 to exit 245, turn east on Weld County Road 34, and travel north on I-25 to exit 252.

Due to weather impacts, the full closure of the Western Frontage Road (County Road 5) south of Larimer County Road 16 remains in place. Please follow posted detour signs. Traffic will be diverted to County Road 7 between LCR 16 and LCR 14.

Johnstown to Fort Collins

To install multiple overhead sign bridges above active roadway, install electrical and tolling
elements and perform concrete finishing work a full closure of southbound I-25 from Mulberry
Street to Harmony Road will take place from:

  • 7 p.m., Friday, September 15 until 11 a.m., Saturday, September 16.

Southbound I-25 traffic will use Exit 269A/Mulberry Street (CO 14 East), continue east on Mulberry to CO 257. Turn right on CO 257, continue south to Harmony Road and turn right. Continue to west the southbound I-25 on-ramp. No access to southbound I-25 from Prospect Road during the full closure.

Prospect Road to southbound I-25 traffic will go northbound on I-25 to Exit 269A/ Mulberry
Street (CO 14 East). Continue east on Mulberry Street to CO 257. Turn right on CO 257,
continue south to Harmony Road and turn right. Continue to the southbound I-25 on-ramp.

To perform final paving and striping operations on the new I-25 roadway, various ramp and single lane closures will take place next week:

  • Full closure of the northbound I-25 on-ramp from Harmony Road will take place from:
    • 9 p.m., Sunday until 5 a.m., Monday.

Northbound I-25 on-ramp traffic will go south on I-25 to Exit 262/CO 392 and turn left.
Continue back onto northbound I-25.

Intermittent full closures of the northbound I-25 off-ramp to Prospect Road will take place:

  • Nightly from 9 p.m. until 5 a.m., Monday, Thursday and Friday.

Northbound I-25 off-ramp traffic will continue north on I-25 to Exit 269/Mulberry Street and continue back on southbound I-25 to Exit 268/ Prospect Road.

Intermittent full closures of the southbound I-25 on-ramp from eastbound Mulberry Street and
off-ramp to Prospect Road will take place: 

  • Nightly from 9 p.m. until 5 a.m., Sunday through Thursday.

Southbound I-25 on-ramp from Mulberry Street traffic will continue eastbound on Mulberry Street to northbound I-25 on-ramp. Continue north to Exit 271/Mountain Vista Drive, turn left and continue onto southbound I-25. Southbound I-25 off-ramp to Prospect Road traffic will go south on I-25 to Exit 265/Harmony Road and turn left. Continue back onto northbound I-25 to Exit 268/ Prospect Road.

Intermittent full closures of the southbound I-25 on-ramp from Prospect Road will take place:

  • Nightly from 9 p.m. until 5 a.m., Tuesday, Thursday and Friday.

Southbound I-25 on-ramp traffic will go north on I-25 to Exit 269/Mulberry Street and continue back onto southbound I-25.

Daytime single lane closures on southbound I-25 will take place between Mulberry Street and Prospect Road daily from 9 a.m. until 3 p.m., Tuesday through Friday.

Single lane closures on I-25 between US34 and Mulberry Road will take place nightly, 9 p.m.
to 5 a.m., Sunday through Friday.