Projects

I-25 North Express Lanes: 120th to Northwest Parkway/E-470

Work continues as crews make significant progress by paving and installing overhead signs. Expect the following major impacts to the highway:

Paving Operations:

  • Work hours: Sundays through Thursdays, from 9:30 p.m. to 5:30 a.m., and Fridays, from 9:30 p.m. to 9 a.m., through September.
  • Impacts: Expect nightly double-lane closures on I-25 between 104th Ave. and E-470.
  • Please drive at slower speeds and follow at safe distances.

Overhead Sign Installation:

  • • Work hours: From September 16-30, Sundays through Thursdays, from 9:30 p.m. to 5:30 a.m.
  • • Impacts: Expect 7 nights of intermittent full closures on I-25 between 104th Ave. and E-470. The general public will detour around these closures using Huron St. and Washington St. Commercial vehicles will detour SB at CO 7 to US 287 and NB at CO 44 to US 85.
  • A daily schedule of closures and locations will be posted as the closures approach. Please check back for more information!
  • All work is weather dependent and subject to change.

Between September 16-23, crews will perform overhead sign installation, requiring 6 nights of full closures on I-25. All work is weather dependent and subject to change.

Full Closure Schedule - Week of September 16-20

Monday, September 16, from 9:30 PM - 5:30 AM

  • FULL CLOSURE on NB I-25 between 104th Ave. to 120th Ave.
    • The general public will be detoured onto Washington St. Commercial trucking vehicles will be detoured onto CO 44 to US 85.
    • The 104th Ave. on-ramp will be closed.

Tuesday, September 17, from 9:30 PM - 5:30 AM

  • FULL CLOSURE on SB I-25 between 136th Ave. to 120th Ave.
    • The general public will be detoured onto Huron St. Commercial trucking vehicles will be detoured onto CO 7 to US 287.
    • The SB 136th Ave. on-ramp will be closed.

Wednesday, September 18, from 9:30 PM - 5:30 AM

  • FULL CLOSURE on NB I-25 between 120th Ave. to 136th Ave.
    • o The general public will be detoured onto Washington St. Commercial trucking vehicles will be detoured onto CO 44 to US 85.
    • The NB 120th Ave. on-ramp will be closed.

Thursday, September 19, from 9:30 PM - 5:30 AM

  • FULL CLOSURE on NB I-25 between 120th Ave. to 136th Ave.
    • o The general public will be detoured onto Washington St. Commercial trucking vehicles will be detoured onto CO 44 to US 85.
    • The NB 120th Ave. on-ramp will be closed.

Detour Routes

    • General Public Detour ¬¬– Motorists will be detoured around the full closures using Huron St. to the west and Washington St. to the east. Motorists will exit the highway ahead of the closures and re-enter the highway at the next on-ramp.
    • Commercial Vehicle Detour ¬– SB trucks will be detoured onto CO 7 to US 287 and may re-merge onto I-25 at 120th Ave. NB trucks will be detoured onto CO 44 to US 85 to CO 7 and may re-merge onto I-25 at CO 7.

Project Facts

  • Goal: Increase mobility and travel choice along a six-mile segment of I-25 by building an Express Lane in each direction of a highway that connects downtown Denver to major growth in northern Colorado.
  • Cost: $21.5 million
  • Timeline: March 2019 - summer 2020
  • Contractor: Graham Contracting Ltd.
  • Location: I-25 between 112th Avenue and Northwest Parkway/E-470
north i 25 express lanes

Background

In August 2011, CDOT completed a Final Environmental Impact Statement (FEIS), which identified and evaluated multi-modal transportation improvements for I-25, including the stretch between US 36 and Colorado Highway 7—among the most congested in the Denver metro area. (On average, 174,000 vehicles travel this stretch each day.) The FEIS' preferred alternative for the corridor will increase safety, capacity and user choice.


Phases

  1. Spring 2016 - Fall 2018
    Crews focused on the outside portions of I-25 and completed ramp reconfiguration work.

  2. Started in March 2019 and ongoing
    Crews are focusing on the inside portion of I-25 by:
    • installing new concrete median barrier and lighting;
    • incorporating tolling infrastructure for the new Express Lanes;
    • making technology improvements;
    • resurfacing the pavement with new asphalt;
    • restriping the roadway; and
    • completing ramp improvements, including metering, to improve operations.

Schedule & Travel Impacts

Work hours:

  • 7 a.m. - 4 p.m. and 9:30 p.m. to 5:30 a.m. Mondays - Fridays
  • 9:30 p.m. to 9 a.m. Saturdays and Sundays

Throughout this project, motorists can expect:

  • nighttime double-lane closures in both directions of I-25 between 112th Avenue and CO 7;
  • intermittent daytime shoulder closures on I-25;
  • a speed-limit reduction to 55 mph; and
  • traffic shifts and narrower lanes.

Benefits

This project will:

  • Add capacity and ultimately provide the choice of a reliable trip with the addition of one HOV/Express Lane in both directions of I-25.
  • Install an auxiliary lane along northbound I-25 to connect the 136th Avenue on-ramp to the 144th Avenue off-ramp, which will help drivers merge more comfortably between the two interchanges.
  • Improve driving conditions by resurfacing the roadway.
  • Address necessary drainage and utility improvements along the corridor.
  • Improve technology.
  • Improve operations at ramps through traffic metering devices.

How to use Express Lanes

Express Lanes increase roadway capacity and help manage congestion on Colorado highways by adding lanes that provide a new choice to drivers. Motorists can choose to ride the bus, carpool or pay a toll to use the new Express Lanes as an alternative to the free, general purpose lanes.

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