Boulder to upgrade signals at 3 high-risk intersections for safer travel beginning in March

The City of Boulder is beginning construction on a set of grant-funded projects to reduce traffic fatalities and serious injuries at three key intersections: Baseline Road and Broadway, Baseline Road and Mohawk Avenue, and Folsom Street and Pine Street. Travelers can expect one-lane closures for vehicles and detours for people biking and walking, with impacts posted to Cone Zones. Work is weather-dependent and scheduled through spring 2026, with most impacts anticipated for April and May.

Compared to the rest of the city, these locations have either a higher risk for crashes overall or a history of serious or fatal crashes, especially for people walking and biking. The upgrades will primarily improve signals. Changes vary by location and include:

• Protected left-turn and right-turn phasing.
• Dedicated turn lanes.
• Smart signals that operate based on multimodal traffic conditions.
• Adjusted crossing times for people to cross the street in one signal cycle.
• Accessibility improvements to curb ramps.

Grants are an essential source of funding for local transportation projects and support achieving the Boulder community's Vision Zerogoal to eliminate all fatal and serious injury crashes, reduce other types of crashes, and improve travel safety and comfort. Some locations also have additional planned work in the future as part of the Core Arterial Network (CAN): a citywide roadway redesign effortto make key streets safer, more comfortable and more connected.

The projects are funded by a Highway Safety Improvement Program (HSIP) grant awarded to the city in 2021. HSIP grants are administered locally through the Colorado Department of Transportation (CDOT). Learn more at the city's HSIP projects webpage.