North I-25 Express Lanes: Johnstown to Fort Collins


  • There is currently ongoing geotechnical and preliminary surveying work on the south end of the corridor near the CO 402 and US 34 interchanges. This work will result in some shoulder closures on I-25, the east frontage road, CO 402 and US 34.
  • It is anticipated that in June of this year, early utility relocation work will begin in the corridor - specifically along CO 402. There will be nighttime lane closures and daytime shoulder closures associated with this work along CO 402 itself and the east frontage Road in the vicinity of CO 402.
  • US 34 will be widened to three lanes in each direction including bridge widening over I-25.  This work is expected to begin sometime in July of 2018.  Work will occur during the day and at night. There will be some nighttime lane and interstate closures on I-25 to set girders. Advanced notification will be given prior to any closures. 
  • After US 34 is complete - work will transition to the interchange reconstruction at CO 402. Once a start date for this work is determined, it will be posted on the website.

Project ...

The U.S. Department of Transportation (USDOT) has awarded CDOT and local partners a TIGER grant to help it fund a $237 million expansion of North I-25.

Key project features will:

  • 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.

Contractor Selection Late 2017

First Notice to Proceed Early 2018

Second Notice to Proceed Spring 2018

Construction Completed/Toll Commencement Late 2020/Early 2021

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.

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