Pavement rehabilitation project to begin April 7 on CO 157 in Boulder

Project Announcement

March 27, 2026 - Northeastern Colorado - Initial travel impacts anticipated during weeknights and weekends

Boulder — The Colorado Department of Transportation and prime contractor, Acme Concrete Paving Inc., begin a concrete rehabilitation project on Colorado Highway 157 (Foothills Parkway) in early April.

Construction will take place between CO 119 and the Pearl Street exit (Mile Point 2.73 to MP 4.52) within the City and County of Boulder. Major work components include the removal of existing concrete panels, pouring and curing new concrete panels, diamond grinding, sign replacements and guardrail upgrades.

Map of the CO 157 Pavement Rehabilitation Project
Map of the construction zone on CO 157 between CO 119 and the Pearl Street off-ramp.

The $4.3 million project is expected to prolong the service life of the roadway and help resist weather and stress-related deterioration. Additional diamond grinding activities will provide motorists a smoother ride and decrease general wear-and-tear on vehicles. Upgraded guardrails offer added safety benefits to drivers utilizing the heavily traveled corridor. Construction is anticipated to be complete in the fall of 2026.

Traffic Impacts:

  • General working hours and lane closures will take place from 7 p.m. to 7 a.m., Sunday night through Thursday night. Additional weekend day and night work is expected intermittently Friday night through Sunday
  • Motorists will encounter single-lane closures on CO 157 during weeknights, with one lane of traffic open in each direction
  • Initial concrete panel replacements require weekend work in addition to weeknight operations. Motorists can expect various nighttime and daytime closures for the first six to eight weekends of the project
  • Alternate routes are advised during peak travel times
  • The Pearl Street on and off-ramps at CO 157 will experience intermittent closures with detour routes. These closures are expected to be minimal throughout the project’s duration
  • While significant delays are not anticipated, motorists are encouraged to account for up to 10 minutes of extra travel time
  • Please be aware of additional ongoing road construction projects in the area. Teams will coordinate closures to minimize impacts to the traveling public
  • Visit COtrip.org for real-time lane closure updates and road conditions on this project and others throughout the state.

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!