CO 7 Cherryvale Road to 28th Street Resurfacing
One-lane traffic pattern in each direction and major delays expected on CO 7 from 33rd Street to Foothills Parkway in Boulder
By mid next week, traffic will shift to a one-lane traffic pattern in each direction on westbound CO 7 between 33rd Street and Foothills Parkway to allow crews to safely complete work on the eastbound lanes. This traffic configuration may be in place through August.
Crews will perform full-depth reclamation, recycling the existing asphalt and base materials to create a stronger foundation, followed by a new asphalt overlay to improve smoothness and safety for drivers. This work is part of an ongoing project aimed at improving roadway conditions and extending pavement life.
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 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
One-lane traffic pattern in each direction and major delays expected on CO 7 (Arapahoe Avenue):
- Monday, July 7 and Tuesday, July 8, eastbound and westbound left lanes will be closed for striping the traffic pattern
- Wednesday, July 9, motorists can anticipate a one-lane traffic pattern in each direction from 33rd Street to Foothills Parkway
- Traffic reduced to one lane in each direction
- Major delays are expected
- An alternate route is highly advised
- Sidewalks will be closed on the eastbound side of the roadway
- Detour signs will be posted for pedestrians
Additional Traffic Impacts:
- ADA upgrades
- 24/7 right-lane closures at various corners on CO 7 (Arapahoe Avenue) for approximately one week
- Pedestrian routes will be located on the opposite side of the construction
- 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
