CO 121/Wadsworth Signal Improvements in Jefferson County

Work this Week
August 8 - 12, 2022

Motorists should plan for:

  • CO 121/Wadsworth Boulevard at 104th
    • Monday and Wednesday northbound various single lane closures with a left turn lane closure and westbound right lane closure and left turn lane closure
    • Tuesday and Thursday southbound various single lane closures with a left turn lane closure and eastbound right lane closure and left turn lane closure
    • Friday north and southbound right turn lane closure
  • The project will be in operation Monday through Friday from 7 a.m. to 5 p.m.
  • Drivers are asked to obey all speed limit reductions and construction road signs during this time.

About the Project:

The Colorado Department of Transportation will begin a signal improvement project August 1, 2022, on Colorado Highway 121 in Arvada and Westminster. Sturgeon Electric is the contractor for this project.

improvements will take place on CO 21 at 66th Avenue and 87th Drive/84th Parkway in Arvada and on CO 121 at 104th Avenue in Westminster. Work will include:

  • Replacing 30 year old signals with newer signals
  • Installing new vehicle detectors, closed circuit televisions and signal heads.
  • Upgrading the traffic signal communications, conflict monitors, ethernet connections and other cabinet equipment.
  • Updating curb ramps to meet ADA standards.
  • Install signing and minor striping at each intersection.

CO 121 Wadsworth Signal Improvements project map

Click image to enlarge.


Project Benefits

This project will focus on replacing old traffic signal equipment, ensuring that our infrastructure and signal communications are up to date. Traffic signals are a vital part of controlling traffic in a safe and efficient manner by providing regulated movement. Vehicle detection will reduce unnecessary delays and stops at the intersection while improving travel times and increasing the amount of traffic that an intersection can handle.

Other benefits of the project include the installation of Americans with Disabilities Act (ADA) compliant curb ramps. The new ramps willbe in compliance with the Public Right  of Way Accessibility Guidelines (PROWAG) requirements and will provide function accessibility to all travelers using our state and US highways.


Work Schedule:

  • Hours of operation are Monday through Friday 7:00 a.m. to 5:00 p.m.
  • Some night work is anticipated.
  • The project, starting in August, has an anticipated completion date of December 2022.

Traffic Impacts:

  • The project will be in operation Monday through Friday from 7 a.m. to 5 p.m.

Project Facts

  • Cost: $1.8 Million
  • Contractor: Sturgeon Electric
  • Timeline: August - December 2022
  • Location: CO 121 at 66th Avenue and 87th Drive/84th Parkway in Arvada and on CO 121 at 104th Avenue in Westminster