Safe Speed Limits

2025 California Traffic Safety Survey released: Speeding, aggressive driving continue to be concerns

July 9, 2025

UC Berkeley SafeTREC has released the California Traffic Safety Survey 2025. The study was led by Ewald & Wasserman Research Consultants (E&W) and conducted on behalf of the California Office of Traffic Safety (OTS) and SafeTREC. The California Traffic Safety Survey has been conducted annually since 2010, and this year's survey was conducted...

NEW: Updated Safe System Approach Toolkit

July 8, 2025
UC Berkeley SafeTREC is excited to share an update and refresh to our Safe System Approach toolkit, including new strategies, easier navigation, and more!

Covers of the English and Spanish versions of the Safe System Toolkit

Our toolkit, ...

Watch as traffic safety research is explained in 101 seconds

May 6, 2025

There’s a statistic that sticks in the minds of many who work on traffic safety issues: The U.S., among wealthy nations, has the highest rate of road traffic fatalities. People in the U.S. are nearly three times more likely to die in a car crash than people in Australia, and six times more likely than in Sweden.

For Julia Griswold, this troubling fact should be front of mind for everyone, whether they are drivers, cyclists, pedestrians or transportation planners. Griswold runs UC Berkeley’s...

SafeTREC Webinar available: Toolkit for Safe Speed Limit Setting Webinar

January 9, 2024
Want to implement lower speed limits in your community? Watch the SafeTREC, Caltrans, and Rock Miller, PE "Toolkit for Safe Speed Limit webinar" SafeTREC to learn how to get started.

...

California Safe Speeds Toolkit: Current Speed-Limit-Setting Law

Disclaimer

This Toolkit does not constitute a standard, specification, or regulation. This Toolkit is not intended to replace the existing Caltrans mandatory or advisory standards and is not intended to be a substitute for engineering knowledge, experience or judgment. This Toolkit promotes better access to helpful information and concepts from various agencies and organizations. UC Berkeley and Caltrans acknowledge the existence of other practices and provide this Toolkit for reference and direction for those responsible for making professional engineering or other design...