Alternating median closures planned on CO 119 at 83rd Street and Oxford Road Jan. 14 and 15

Travel Advisory

Jan. 13, 2026 - Northeastern Colorado - Single-day closures of 83rd Street and Oxford Road medians needed for CO 119 Safety, Mobility and Bikeway Improvements Project

Boulder County — The Colorado Department of Transportation and its contractor, Kraemer North America, will implement alternating, temporary full closures of the 83rd Street and Oxford Road medians between the northbound and southbound lanes of Colorado Highway 119/Diagonal Highway on Wednesday, Jan. 14, and Thursday, Jan. 15, to allow crews to install traffic light poles as part of the CO 119 Safety, Mobility and Bikeway Improvements Project.

On Wednesday, Jan. 14, and Thursday, Jan. 15, from 7 a.m. to noon, the 83rd Street median will be closed.

On Wednesday, Jan. 14, and Thursday, Jan. 15, from noon to 5 p.m., the Oxford Road median will be closed.

Each median will be closed to all modes of transportation and will not be closed at the same time.

Traffic Impacts

Detour Route for 83rd Street Median Closure (7 a.m. to noon, Jan. 14 and Jan. 15)

  • Northbound CO 119/Diagonal Highway travelers intending to turn left on 83rd Street will pass 83rd Street, continue on northbound CO 119, turn left onto the Airport Road median and turn left and continue onto southbound CO 119
  • Southbound CO 119/Diagonal Highway travelers intending to turn left onto 83rd Street will pass 83rd Street, continue on southbound CO 119, turn left onto the Niwot Road median and turn left to continue onto northbound CO 119. This will also be the signed detour route for cyclists

Detour Route for Oxford Road Median Closure (Noon to 5 p.m., Jan. 14 and Jan. 15)

  • Northbound CO 119/Diagonal Highway travelers intending to turn left on Oxford Road will pass Oxford Road and continue on northbound CO 119 to turn left onto the Airport Road median, turn left onto southbound CO 119 and turn right to access Oxford Road
  • Southbound CO 119/Diagonal Highway travelers intending to turn left on Oxford Road will pass Oxford Road and turn left onto the Niwot Road median, then turn left to access northbound CO 119. This will also be the signed detour route for cyclists

What is the CO 119 Safety, Mobility and Bikeway Improvements Project?

By the year 2040, the Diagonal Highway between Boulder and Longmont is expected to see a 25% increase in vehicular traffic. Increased traffic can result in more congestion, delays, tailpipe emissions and, potentially, more crashes.

The CO 119 Safety, Mobility and Bikeway Project is constructing safety, mobility and bikeway improvements to make traveling through the corridor safer for all modes of transportation and make transit travel faster and more reliable. The project is designed to integrate with other active multimodal projects on the corridor to ensure community members can safely and reliably travel throughout the corridor using their preferred mode(s) of transportation.

This project will:

  • Improve safety in the whole corridor
  • Maximize the number of people able to move through the corridor
  • Maximize intersection operational efficiency
  • Improve transit travel times and increase ridership
  • Maximize corridor-wide operational efficiency
  • Increase opportunities for bicycle commuting and connectivity to the bicycle and pedestrian network

Specific corridor improvements include:

  • New signage, striping and improved signal timing at all pedestrian crossings at signalized intersections
  • Signal timing adjustments at key intersections (Jay Road, 63rd Street, Colorado Highway 52, Niwot Road and Airport Road)
  • Adding a commuter bikeway and several local connections between northbound and southbound CO 119, and underpasses or overpasses at major intersections for uninterrupted crossing
  • Physically reconfiguring the CO 52 intersection to improve safety and to accommodate new Bus Rapid Transit (BRT) stations and the Diagonal Bikeway between the northbound and southbound travel lanes
  • Changing access at Airport Road and CO 119 to reduce crashes and improve safety and traffic flow

During construction, CO 119/Diagonal Highway will largely remain configured as it currently operates, with various lane shifts and closures. Additional information will be provided prior to any major closures or detour routes throughout the project duration. In addition, lane and shoulder widths will be minimized. The speed limit will be reduced. Please pay attention and follow posted speed limits. Kraemer North America is the General Contractor for this project.

CO 119 Safety, Mobility and Bikeway Improvements Project Contact Information

  • Project phone line: 720-378-8083
  • Project email: [email protected]
  • Project website: codot.gov/projects/co119-mobility
  • Sign up for weekly project updates on the project website by following these five simple steps:
    • Visit the project website
    • Click on the "Stay Informed" box on the right side of the page
    • From there, scroll to the "Construction Updates & News Releases" section and select "Subscribe to Construction Updates"
    • Enter your email address, then select "Northeast Colorado" as the region, check "Front Range I-25 Corridor" and "CO 119 Safety & Mobility Improvements"
    • Scroll to the bottom and select the submit button

Know Before You Go

Travelers are urged to “know before you go.” Gather information about weather forecasts and anticipated travel impacts and current road conditions prior to hitting the road. CDOT resources include:

Remember: Slow For The Cone Zone

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!

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