Motorized Vehicle Safety

California Traffic Safety Survey 2026

Ewald, Katrin
Wasserman, Lisa
2026

The Traffic Safety Public Opinion Study is conducted annually for the California Office of Traffic Safety (OTS) and the Safe Transportation Research and Education Center at UC Berkeley (SafeTREC). Eligible participants were California drivers aged 18 years and older. As in previous years, predetermined quotas were established by age and gender; however, the 2026 study used more detailed age categories aligned with U.S. Census data. For the 2026 version of the Traffic Safety Public Opinion Study, a substantially larger cross-section of 10,014 drivers were surveyed between June and July 2026...

New research report: "Trust in the wild: Multi-modal safety perceptions in naturalistic AV deployment"

August 24, 2026
Submitted by Karen Nguyen Vo

A Waymo robotaxi drives on the street in San Francisco.

How much do people trust automated vehicles (AVs), and do trust levels change with the amount of exposure one has to them?

A new UC Berkeley SafeTREC study surveyed 811 San Francisco residents who have had real-world exposure to AVs — 376 robotaxi passengers and 435 non-passengers who are pedestrians, bicyclists, or drivers...

https://www.sciencedirect.com/science/article/pii/S1369847826002330?via%3Dihub

7/29/2026 CPBS webinar: SafeTREC researchers Matthew Raifman and Sujin Lee present data analysis on San Francisco's speed cameras

July 24, 2026
Submitted by Karen Nguyen Vo

A speed camera installed on a traffic light pole is pointed at a road with car drivers and motorcyclists.

On Wednesday, July 29 at 11 a.m. Pacific Time, SafeTREC research lead Matthew Raifman and postdoctoral researcher ...

New SafeTREC resource: California Autonomous Vehicle Crash Dashboard

June 29, 2026
Submitted by Kayley Chan
UC Berkeley SafeTREC has launched our new California Autonomous Vehicle Crash Dashboard, which provides a public resource to explore autonomous vehicle crash data reported in California. The data provided includes crashes from July 2021 onwards, reported under the requirements of the National Highway Traffic Safety Administration’s (NHTSA) Standing General Order (...

New Release: 2022 SafeTREC Traffic Safety Fact Sheets

September 12, 2022
Submitted by Lisa Peterson
2022 SafeTREC Traffic Safety Fact Sheets feature recent data on some of California's most pressing traffic safety issues to help inform future road safety efforts

UC Berkeley SafeTREC is excited to announce the release of the 2022 series of Traffic Safety Fact Sheets, which feature traffic safety data and trends at the national and state level on a variety of road safety topics. This series also highlights the Safe System approach to road safety, which the United States Department of Transportation...

SafeTREC Traffic Safety Facts: Seat Belt Use

September 18, 2018
SUBMITTED BY LISA PETERSON

Welcome back to the SafeTREC Traffic Safety Facts blog series! Each day this week we will feature recent data on some of California's most pressing traffic safety issues. Today, we will be highlighting the facts on seat belt use.

In case you missed them, check out the fact sheets on:

Alcohol-Impaired Driving Aging Road Users Bicycle Safety...

SafeTREC Traffic Safety Facts: Drug-Involved Driving

September 19, 2018
SUBMITTED BY LISA PETERSON

Welcome back to the SafeTREC Traffic Safety Facts blog series! Each day this week we will feature recent data on some of California's most pressing traffic safety issues. Today, we will be highlighting the facts on drug-involved driving.

In case you missed them, check out the fact sheets on:

Alcohol-Impaired Driving Aging Road Users Bicycle Safety...

SafeTREC Traffic Safety Facts: Emergency Medical Services

September 20, 2018
SUBMITTED BY LISA PETERSON

Welcome back to the SafeTREC Traffic Safety Facts blog series! This summer, we have featured recent data on some of California's most pressing traffic safety issues. Today, we will wrap up the Series - for now! - and highlight the facts on emergency medical services.

We hope you have enjoyed exploring our traffic safety findings! Stay tuned for more posts in the series. And in case you missed any of the prior posts, check out the fact sheets on:

Alcohol-Impaired Driving...

California Traffic Safety Survey 2022: Speeding and Aggressive Driving Biggest Safety Concern

June 1, 2022
Submitted by Lisa Peterson

UC Berkeley SafeTREC is excited to release the 2022 California Traffic Safety Survey led by Ewald & Wasserman Research Consultants (E&W). This study was conducted on behalf of the California Office of Traffic Safety (OTS) and the Safe Transportation Research and Education Center (SafeTREC) at the University of California, Berkeley.

Speeding and Aggressive Driving Biggest Safety Concern

Speeding and aggressive driving was the biggest safety concern for California drivers (75.0% of surveyed...

California Traffic Safety Survey 2023: Speeding and aggressive driving, distracted driving, and drunk driving biggest safety concerns

July 3, 2023
Submitted by Lisa Peterson

UC Berkeley SafeTREC is excited to release the 2023 California Traffic Safety Survey led by Ewald & Wasserman Research Consultants (E&W). This study was conducted on behalf of the California Office of Traffic Safety (OTS) and the Safe Transportation Research and Education Center (SafeTREC) at the University of California, Berkeley.

Speeding and Aggressive Driving Biggest Safety Concern

According to survey responses, the...