Southbound US 287 at the CO 52 intersection will be closed 18 hours next weekend

Travel Advisory

May 4, 2023 - Northeastern Colorado - Detour route will be in place to West 95th Street

Boulder County – The Colorado Department of Transportation will implement a full closure of southbound US Highway 287 at the Colorado Highway 52 intersection from 11 p.m. on Friday, May 12, through 5 p.m. on Saturday, May 13. The closure is necessary while crews replace damaged concrete panels in the southbound US 287 lanes.

During the full closure, all southbound traffic will be detoured west on CO 52 to West 95th Street, south to Lookout Road and east to US 287. Variable message boards, signs and construction devices will be present alerting motorists to the closure and detour route. The closure is part of the US 287/CO 52 Intersection Improvement project that is underway.

Project Location

The project is located at the intersection of US 287 and CO 52 between the cities of Longmont and Broomfield in Boulder County. The work zone on US 287 extends north/south from MP 310.140 to MP 310.670, and east/west from MP 4.35 to MP 5.0 on CO 52.

Full closure of southbound US 287 detour map May 12 May 13 detour map from Mile Point 310.140 to MP 310.670, and east to west from MP 4.35 to MP 5.0 on CO 52.
Full closure of southbound US 287 detour map May 12 May 13 detour map from Mile Point 310.140 to MP 310.670, and east to west from MP 4.35 to MP 5.0 on CO 52.

Hours of Full Closure of Southbound US 287

  • The closure will be in place from 11 p.m. on Friday, May 12, and run continuously until approx. 5 p.m. on Saturday, May 13.
  • All construction schedules are weather dependent and subject to change.

Traffic Impacts & Detour Route

  • No traffic will be permitted on southbound US 287 between CO 52 and Lookout Road during the period of closure
  • All southbound traffic will be detoured west on CO 52 to W. 95th St., then south to Lookout Road and east to US 287 to bypass the closure
  • Local access will be maintained
  • Single lane closures will exist on northbound US 287 at the intersection during the full closure of southbound US 287
  • Motorists can expect delays
  • Caution is advised
  • Lane closures and other traffic notices are posted weekly to COTrip.org
  • All construction schedules are weather dependent and subject to change

Project Contact Information

For additional information about this project, contact the project team.

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!

Download the COtrip App!

The new FREE COtrip Planner mobile app was designed to meet the growing trend of information on mobile and tablet devices for the traveling public. The COtrip Planner app provides statewide, real-time traffic information, and works on mobile devices that operate on the iOS and Android platforms. Visit the Google Play Store (Android devices) or the Apple Store (iOS devices) to download!