CO 7 Cherryvale Road to 28th Street Resurfacing

Travel Alert

  • Traffic will shift on Monday, Sept. 15, 2025 to a one-lane traffic pattern in each direction to the eastbound lanes of CO 7 (Arapahoe Avenue) between Foothills Parkway and Range Street.
  • CO 7 and 48th Street partial intersection closure begins Friday, Sept. 19,2025 through Monday, Sept. 22, 2025

For the Colorado Buffaloes football game on Saturday, Sept. 20, 2025, fans should expect heavy traffic and avoid Arapahoe Avenue. An alternate route is highly advised.

About the Project

The Colorado Department of Transportation and contractor Asphalt Specialties Co. began a construction project on Colorado Highway 7 (Arapahoe Avenue) between 28th Street and extending east to Cherryvale Road in Boulder.

Work on this project is scheduled for completion in late December 2025.

The existing asphalt will be milled and overlaid with new asphalt. Milling removes the worn-out surface layer, and the fresh asphalt overlay restores the road's smoothness and improves safety. While work is in progress, erosion control measures will be in place to prevent sediment runoff and protect water resources during construction.  

Work also includes ADA upgrades that include curb ramp installations. These curb ramps are a small but important part of making sidewalks, street crossings and other pedestrian routes accessible to everyone. 

Additionally, the City of Boulder will coordinate with CDOT to launch the East Arapahoe Bus and Turn Lanes Signing & Striping Project, which will convert underutilized right-through lanes into shared curbside lanes for buses and right-turning vehicles only, and provide improved trip reliability for the existing bus service routes. This joint effort will help reduce costs, shorten construction timelines and lessen disruptions for the community.

This combined project between the City of Boulder and CDOT will provide improved ADA and safer connections to the corridor and bus service, as well as necessary safety and riding surface improvements for all modes utilizing the corridor. Partnering on these projects reduces the overall construction duration and impact on users in the corridor.

Work this Week & Lane Closures for CO 7 Cherryvale Road to 28th Street

Project Facts

  • Construction Cost: $5 Million
  • Contractor: Asphalt Specialties Co.
  • Timeline: April 2025 to December 2025
  • Location: CO 7 (Arapahoe Avenue) between Cherryvale Road and 28th Street
    • Nearest Town/City: Boulder
    • Mile Point(s): MP 52.3 to MP 55.5
    • County: Boulder
Project location map of CO 7 (Arapahoe Avenue) between Cherryvale Road and 28th Street in Boulder
Project location map of CO 7 (Arapahoe Avenue) between Cherryvale Road and 28th Street in Boulder.

Project Benefits

  • Milling removes the worn-out surface layer, and the fresh asphalt overlay restores the road's smoothness and improves safety
  • Erosion control measures will prevent sediment runoff and protect water resources during construction
  • ADA curb ramps are a small but an important part of making sidewalks, street crossings and other pedestrian routes accessible to everyone
  • Business Access and Transit (BAT) lanes improve traffic flow and reduce travel time for buses and vehicles, while still allowing motorists to reach local businesses

Work Schedule

  • Monday through Friday, from 9 a.m. to 4 p.m.
  • The work schedule is weather-dependent and subject to change

Traffic Impacts

CO 7 Eastbound One-Lane Traffic Configuration

Traffic will shift to a one-lane traffic pattern in each direction on the eastbound lanes of CO 7.

  • CO 7 between Foothills Parkway and Range Street will be reduced to one-lane in each direction
  • Sidewalks and bus stops will be closed on the westbound side of the roadway
  • Detour signs will be posted for pedestrians
  • Major delays are expected
  • An alternate route is highly advised
  • Business access will remain open
  • The speed limit will be reduced to 35 MPH throughout the work zone
  • Please be aware of construction vehicles entering and exiting the work area
  • Refer to COtrip.org for real-time travel conditions and road closures
Location map of the westbound closure on CO 7 (Arapahoe Avenue) between Commerce Street and Foothills Parkway in Boulder. Traffic will be reduced to one lane in each direction in the eastbound lanes of CO 7
Location map of the westbound closure on CO 7 (Arapahoe Avenue) between Commerce Street and Foothills Parkway in Boulder. Traffic will be reduced to one lane in each direction in the eastbound lanes of CO 7.

North Intersection Closure at CO 7 and 48th Street

Beginning Friday, Sept. 19, at 5 p.m. through Monday, Sept. 22, at 5 a.m., the north intersection of CO 7 and 48th Street will be closed for milling and paving operations. This traffic configuration will remain in effect throughout the weekend.

  • Access to North 48th Street will be closed
  • Detour from CO 7 (Arapahoe Avenue) to 48th Street
    • Travel east on CO 7 (Arapahoe Avenue), north on Commerce Street, west through the parking lot, then south on 48th Street
  • Detour from 48th Street to CO 7
    • Travel north on 48th Street, east through the parking lot, south on Commerce Street to connect with CO 7
  • Sidewalks and bus stops will be closed on the westbound side of the roadway
  • Detour signs will be posted for pedestrians
  • Motorists should follow posted detour signs
  • Business access will remain open
  • The speed limit will be reduced to 35 MPH throughout the work zone
  • Please be aware of construction vehicles entering and exiting the work area
  • Refer to COtrip.org for real-time travel conditions and road closures
Intersection closure at CO 7 (Arapahoe Avenue) and 48th Street in Boulder. Access to North 48th Street will be closed. A detour route is provided in the Traffic Impacts.
Intersection closure at CO 7 (Arapahoe Avenue) and 48th Street in Boulder. Access to North 48th Street will be closed. A detour route is provided in the Traffic Impacts.