Traffic Advisory: Overnight Traffic Stops on CO 157 and CO 7 in Boulder Sept. 17-21

September 8, 2017 - Northeastern Colorado/CDOT Region 4 - Crews will remove old mast arms and install new ones over traffic lanes

BOULDER – Starting Sunday, Sept. 17, motorists can expect intermittent nighttime traffic stops and delays on CO 157 and CO 7, in Boulder, as crews remove and install new mast arms over the traffic lanes at three intersections. This configuration will be in place from 7 p.m. to 7 a.m. until Thursday, Sept. 21.

The nighttime work is necessary for the safety of crews and motorists during operations, as well as to provide minimal travel impacts.


Motorists need to prepare for delays of up to 15 minutes, with intermittent nighttime traffic stops on CO 7 (Arapahoe Road) and CO 157 (Foothills Parkway). Crews will work on the road from 7 p.m. to 7 a.m., Sunday through Thursday, at the following intersections:  

  • Foothills Parkway (CO 157) and Baseline Road

  • Foothills Parkway (CO 157) and Valmont Road

  • Arapahoe Road (CO 7) and Cherryvale Road

No height or width restrictions will be in place. The speed limit will be maintained at the posted limits.


Crews are removing the existing and outdated traffic signals and equipment to install newer and safer ones. The project will also provide pedestrian and sidewalk improvements, upgrading signing and striping, and replacing curb ramps with Americans with Disabilities Act (ADA) compliant ramps.  

The $1.2 project will improve the safety of roadway for drivers and sidewalks for pedestrians. It encompasses two other intersections in Boulder, and one intersection in Greeley, slated to start later this year. WL Contractors is the prime contractor for this work.


For additional information about this project, call the project information line at 1-844-253-3185, Option 0, email the team at, or visit the project website and sign up for updates at For updates on travel conditions, visit, sign up for GovDelivery, or call 511. Updates are also available via Twitter @coloradodot and CDOT’s Facebook page at