Caltrans to Reduce Speed Limits on Highway 9 from Santa Cruz to Boulder Creek

The statewide transportation agency cites safety and traffic flow concerns for the speed limit adjustments along the winding, mountainous corridor.

Published on Feb. 6, 2026

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Caltrans will soon be reducing speed limits along an 11.6-mile stretch of Highway 9 from just south of Santa Cruz's city limits to north of Boulder Creek. The speed limit will be lowered from 35 mph to 30 mph in one segment, from 30 mph to 25 mph in Ben Lomond, and from 35 mph to 30 mph north of Brookdale. Caltrans cited factors like pedestrian and bicycle traffic, horizontal curves, driveways, and parking as reasons for the adjustments, which aim to improve safety and traffic flow on the narrow, winding highway.

Why it matters

Highway 9 through the Santa Cruz Mountains is known for its scenic beauty but also its treacherous driving conditions, with a history of serious collisions and spinouts. The speed limit reductions are intended to make the road safer for all users, including drivers, pedestrians, and cyclists, by encouraging slower, more controlled speeds along the curvy, access-heavy corridor.

The details

Caltrans studied 11.6 miles of Highway 9 from just south of Santa Cruz to north of Boulder Creek. Based on the findings, the agency will be lowering the speed limit in three specific segments: from 35 mph to 30 mph from just south of San Lorenzo Avenue to south of Hillside Avenue, from 30 mph to 25 mph through the Ben Lomond area, and from 35 mph to 30 mph for 0.90 miles north of Brookdale. The new speed limits will be enforced within the next 30 days once all the signs are updated.

  • Caltrans will begin enforcing the new speed limits within the next 30 days.

The players

Caltrans

The California Department of Transportation, the state agency responsible for managing and maintaining California's highway system.

Lt. Grant Boles

The acting office commander of the California Highway Patrol's Santa Cruz unit.

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What they’re saying

“I would like to remind the motoring public to always drive at a safe speed for the current conditions and drive responsibly.”

— Lt. Grant Boles, Acting Office Commander, California Highway Patrol Santa Cruz (santacruzsentinel.com)

What’s next

The judge in the case will decide on Tuesday whether or not to allow Walker Reed Quinn out on bail.

The takeaway

This speed limit adjustment on Highway 9 highlights the ongoing challenge of balancing the needs of drivers, pedestrians, and cyclists on winding, access-heavy rural roads. While the lower speeds may frustrate some drivers, the changes aim to improve safety and traffic flow along this historically dangerous corridor through the Santa Cruz Mountains.