Evaluation

California Traffic 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...

Impact of the Community Pedestrian and Bicycle Safety Program (CPBSP)

September 14, 2026
Kora Robinson and Lucia Ornelas, MPH

UC Berkeley SafeTREC and California Walks (the project team) conducted Community Pedestrian and Bicycle Safety Program (CPBSP) workshops in seven communities in 2026. All seven of the workshops were conducted in-person. The research brief, "Impact of the Community Pedestrian and Bicycle Safety Program (CPBSP)" discusses findings from the program evaluation, and evaluation developed using the Kirkpatrick Model framework. Levels 1 and 2 of the model (...

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 (...

Impact of the Community Pedestrian and Bicycle Safety Training: Program Insights from the 2023 Follow-Up Survey

Lekshmy Hirandas
2023

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), established in 2009, with funding from the California Office of Traffic Safety. Its main objective is to promote pedestrian and bicycle safety by educating...

Pedestrian and Bicycle Safety Research Brief

July 18, 2017
SafeTREC

Data is the bread and butter of safety analysis. This research brief highlights three new peer-reviewed studies that focus on questions around pedestrian and bicycle safety data and the patterns they identify. Read the full Pedestrian and Bicycle Safety Research Brief to explore our findings

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...

Drivers, Pedestrians, and Cyclists in California Want Complete Streets: Comparison of Results from Roadway Design Surveys of Pedestrians, Drivers, Bicyclists, and Transit Users in Northern and Southern California

Sanders, Rebecca L.
Griffin, Ashleigh
MacLeod, Kara E.
Cooper, Jill F.
2014

This paper compares findings from two recent surveys on roadway design preferences among pedestrians, drivers, bicyclists, and public transit users along major urban corridors in the metro areas of San Francisco and Los Angeles. Sponsored by the California Department of Transportation (DOT), the research explored design preferences that could increase perceived traffic safety, walkability, bikability, and economic vitality along urban arterials. Results from intercept surveys showed that roadway users desire similar design features along the test corridors, which carry 25,000-40,000...

Child Restraint Use: Workbook and Guide for Evaluating Community-based Programs

Ragland, David R.
Geyer, Judy A.
Cooper, Jill F.
2003

The leading cause of injury and death for children in California is motor vehicle crashes. To prevent these needless tragedies, the California Office of Traffic Safety (OTS), through the Business, Transportation and Housing Agency, funds child passenger safety programs throughout the state. This workbook is designed to be used by these local programs to 1) evaluate the impact of their activities on child restraint use, 2) evaluate results to improve or modify the programs as needed, and 3) meet contractual evaluation requirements. Program evaluations can be difficult for local programs due...

Attribution of functional limitation to cancer decreases in the year following breast cancer diagnosis in older patients

Sehl, Mary E.
Satariano, William A.
Ragland, David R.
Reuben, David B.
Naeim, Arash
2008

Objectives: To examine the prevalence of self-reported functional limitations in a breast cancer population, identify whether these reported limitations are attributed to breast cancer versus other coexisting illnesses, and examine how this attribution changes over time from early in treatment to 9 months later.

Design: Longitudinal, observational study.

Setting: Community dwelling adults in Detroit metropolitan area. Participants: 2033 participants (1011 breast cancer patients, 1022 controls) aged 40–84 years.

Measurements: Participants were asked about each of 23...