Improvements at eight key intersections to include better signage and signals for left turns

The City of Boulder has begun a set of grant-funded transportation safety improvement projects at eight key, high-traffic intersections to reduce serious-injury and fatal crashes. Work is focused on signal upgrades to improve safety, such as installing new signal poles, cabinets, detection and controllers, that allow different types of left-turn phasing to operate throughout the day based on multimodal traffic conditions.

Construction for the first project begins at the Broadway and Regent Drive/20th Street intersection. Work is weather-dependent and scheduled over the week of spring break, March 24-28, to reduce travel impacts. Travelers can expect bike and pedestrian detours and one-lane closures on northbound Broadway, just south and north of Regent Drive.

Construction impacts will be posted to Cone Zones as work is scheduled for each project through spring 2025. This includes improvements at the following intersections:

  • Broadway and Regent Drive/20th Street.
  • Arapahoe Avenue and 15th Street.
  • Broadway and Balsam Avenue.
  • 28th Street and Kalmia Avenue.
  • Pearl Street and 26th Street.
  • Arapahoe Avenue and 48th Street.
  • Baseline Road and Manhattan Drive/Crescent Drive.
  • 30th Street and Aurora Avenue.

Boulder is a Vision Zero city with a community goal to reduce the number of fatal and serious-injury crashes to zero, as well as reduce other types of crashes and improve travel safety and comfort. Based on data that shows left-turn crashes are one of the most common crash types in Boulder, the city’s Vision Zero Action Plan includes a targeted focus on improving left turns at key streets, supported by these signal reconstruction projects. Learn more on the Safer Main Streets webpage or about transportation safety on the Vision Zero webpage.

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