US 287 & CO 52 Intersection Safety Improvements

About the Project:

This project will improve the safety and operational efficiency of the US 287/CO 52 intersection.

CO52 will be widened on the north and south sides to accommodate an additional left turn lane and create a 6-foot bicycle lane for both eastbound and westbound traffic.

US 287 will be widened to the east to accommodate an additional left turn lane for both northbound and southbound traffic.

Crews will add capacity at all four corners to improve traffic flow. Traffic signal poles, pedestrian poles and ADA ramps will also be replaced to maintain a pedestrian friendly signalized intersection. Replacement of culverts and ditches is also planned for the project.

Project Benefits:

  • Improved traffic flow with additional lanes and wider shoulders
  • Enhanced safety for all modes of transportation with the addition of traffic signals and a bike path
  • Upgraded accessibility for all pedestrians with the addition of ADA curb ramps

Work Schedule:

  • The project began in January with anticipated completion by September
  • Working hours are 7 a.m. to 7 p.m. Monday to Friday, unless otherwise approved by the CDOT Project Engineer
  • No weekend or observed holiday work is expected
  • All construction schedules are weather dependent and subject to change

Traffic Impacts:

  • Motorists can expect alternating single lane closures on both US 287 and CO 52 at the intersection during work operations
  • These closures will be in place from 9 a.m. to 4 p.m. Monday to Friday (holidays excepted)
  • The right turn lanes in all directions are fully closed
  • Automated temporary traffic signals are in place and will remain activated until further notice
  • Uniformed traffic control personnel, flaggers, signs, and construction devices will be present to manage traffic flows during certain work activities
  • Motorists can expect short delays up to five minutes during traffic holds
  • Full access to roadways, area businesses and driveways will be maintained
  • A 10-foot width restriction is in place 24/7 through the work zone
  • Lane closures and other traffic notices are posted weekly to
  • All construction schedules are weather dependent and subject to change

Work this Week & Lane Closures
US 287 & CO 52 Intersection Improvements

Project Facts

  • Cost: $5.1 Million
  • Contractor: Villalobos Concrete Inc
  • Timeline: January to September 2023
  • Location: Intersection of US Highway 287 and Colorado Highway 52 between Longmont and Broomfield in Boulder County
    • Mile Points: 310.14 to 310.67
    • County: Boulder

US 287 Intersection map revised 12-2022