Introduction
The work represents the final phase of a Transportation Sales Tax-funded corridor project that will address the aging concrete surface on South Boulder Road from east of Manhattan Drive, city limits, to Cherryvale Road.
Project Scope
As described in the sales tax initiative, the project will include:
- Cherryvale Road and South Boulder Road intersection safety improvements;
- Asphalt paving from Manhattan Drive to Cherryvale Road;
- New underpass for the City of Boulder’s South Boulder Creek Trail that will be taller and wider than the current underpass;
- New pedestrian facilities; and,
- New fencing
Cherryvale and South Boulder Road Intersection Roundabout
A cost-benefit analysis that evaluated safety and cost determined that the current signalized intersection at South Boulder and Cherryvale roads should be reconstructed as a roundabout.

Current intersection of South Boulder and Cherryvale roads

Rendering of the proposed roundabout at Cherryvale and South Boulder Road
55th Street and South Boulder Road Pedestrian Crossing
A pedestrian-activated crosswalk, also known as a “HAWK” beacon, is being evaluated for the intersection of 55th Street and South Boulder Road to enhance multimodal movement across South Boulder Road.

Rendering of South Boulder Road and 55th Street intersection improvements
Project Timeline
This project is currently in the preliminary design phase. Public Works currently does not have an anticipated construction timeframe.
- Public Meetings
No public meetings are currently scheduled.
Previous Meetings
- July 16 – Public Meeting to Share Preliminary Designs
- Engineering staff and the consulting engineer shared plans for roadway improvements, including the new roundabout at Cherryvale Road and South Boulder Road. A question and answer session followed a presentation.
- Watch a recording of the meeting
Project Contact
For more information, please contact David Thompson, project manager, at dfthompson@bouldercounty.gov.

