Data collection

Autonomous Vehicles (AV) Safety Dashboard launched: Visualize AV crashes and mileage data in California

September 10, 2025
Submitted by Karen Nguyen Vo

Main page of the AV Safety Dashboard, including graphs, tables, and figures on AV testing crash data

UC Berkeley SafeTREC has recently launched an Autonomous Vehicles (AV) Safety Dashboard, which allows users to visualize all reported crash incidents from 2014-2025 and all...

Explore our new Autonomous Vehicles Safety Dashboard

August 11, 2025
Submitted by Lisa Peterson
Autonomous Vehicles (AV) Safety Dashboard - visualize AV crashes and mileage data in California

UC Berkeley SafeTREC is excited to announce the launch of our new Autonomous Vehicles (AV) Safety Dashboard, a set of tools that allows users to visualize all the reported crash incidents from 2014-2025 and all reported mileage data from 2019-2024 for autonomous vehicles with AV Testing and AV Driverless Testing Permits from the California Department of Motor Vehicles (DMV) during that time....

2025 Follow-up survey highlights the impact of the Community Pedestrian and Bicycle Safety Training

August 6, 2025
Submitted by Kris Leckie
Preliminary Statewide Integrated Traffic Records System (SWITRS) data for 2024 indicates that traffic crashes caused 3,376 preventable deaths statewide, of which 950 were pedestrians and 148 bicyclists. Additionally, in 2024, there were 16,142 people seriously injured in traffic crashes in California, including 2,531 pedestrians and 1,255 bicyclists. These deaths are unacceptable and preventable. Ensuring that our communities are safe for walking, biking and rolling is critical for community...

Impact of the Community Pedestrian and Bicycle Safety Training: Program Insights from the 2025 Follow-Up Survey

Kyler Blodgett
Chen, Katherine L.
2025

The Community Pedestrian and Bicycle Safety Training Program (CPBST) is a collaborative effort between the Safe Transportation Research and Education Center (SafeTREC) at the University of California Berkeley and California Walks (Cal Walks) with funding from the California Office of Traffic Safety. Its main objective is to promote pedestrian and bicycle safety by educating residents and safety advocates, empowering community partners to advocate for safety improvements in their neighborhoods, and fostering collaboration between community participants, local officials, and agency staff....

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

July 9, 2025
Submitted by Karen Nguyen Vo

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
Submitted by Kris Leckie
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, ...

Street Story: A platform for community engagement

Street Story

Street Story is a community engagement platform provided by UC Berkeley SafeTREC in English and Spanish that allows residents, community groups, and agencies to collect information about transportation crashes, near misses, general hazards, and safe locations to travel. The tool is free to use, anonymous, and publicly accessible. Street Story is not a...

SafeTREC's Amalia Stahl to present at the 2025 Traffic Records Forum

June 30, 2025
Submitted by Lisa Peterson

UC Berkeley SafeTREC research data analyst Amalia Stahl will present "Autonomous Vehicle Safety in California: Visualizing AV Safety Data in a Simple andPromotional graphic for the 2025 Traffic Records Forum in Boston, MA Accessible Way for the General Public" at the Association of Transportation Safety Information Professionals (ATSIP) 2025 Traffic Records Forum on Monday, July 7, 2025. The Traffic...

California Traffic Safety Survey 2025

Ewald, Katrin
Wasserman, Lisa
2025

The 2025 Traffic Safety Public Opinion Study was conducted for the California Office of Traffic Safety (OTS) and the Safe Transportation Research and Education Center of UC Berkeley (SafeTREC). The findings of the 2025 Study are based on a sample size and eligibility criteria similar to previous years of data collection. A total of 2,319 responses were collected in April and May 2025 using an online selfadministered survey. Similar to previous years of the study, the survey panelists were provided through Marketing Services Group, a commercial sample and panel vendor.

The survey...

Evaluation of Wet Weather Accident Causation Criteria

Oh, Soonmi
Ragland, David R.
Chan, Ching-Yao
2008

This report documents findings from analysis of traffic collision data from sites that display high collision rates only under wet pavement conditions. These sites were selected using Caltrans safety engineers’ field reports, Wet Table C “investigation required” locations, and a new approach called Continuous Risk Profile (CRP). The geometric features at the sites were studied via field visits and review of as-built plans. Rapid spatial changes (i.e., vertical and horizontal curve in short distance), narrower lane width, lack of median, and wider total freeway width were some of the...