Bicycle safety

Course Announcement: Fall 2022 Public Health Injury Prevention and Control

July 6, 2022

Photo collage showing emergency responders at a car crash, a gun with ammunition, and a crashed bicycle and bicycle helmet in a crosswalk


Injury is the leading cause of death for ages 1-44, and the leading cause of years of potential life lost up to age 65,...

Impact of the Community Pedestrian and Bicycle Safety Training Program: Insights from the 2022 Follow-Up Survey

Aqshems Nichols
Chen, Katherine L.
Jill F. Cooper

The Community Pedestrian Bicycle Safety Training (CPBST) program is a collaborative project between UC Berkeley Safe Transportation Research and Education Center (SafeTREC) and California Walks (Cal Walks) that seeks to assist communities with three goals:

Identifying and better understanding their local transportation safety needs; Developing and strengthening local partnerships between various stakeholders in their community; and Generating a community-specific action plan for improving the safety of active transportation in their area.

These objectives are pursued through...

Street Story: A Platform for Community Engagement

Share stories about where you've been in a crash or near miss, or where you feel safe or unsafe traveling using our Street Story tool.

Street Story

Street Story is a community engagement tool that allows residents, community groups and agencies to collect information about transportation collisions, near-misses, general hazards and safe locations to travel. To promote access to the tool, SafeTREC conducts technical assistance with communities and...

Transportation Injury Mapping System (TIMS)

The Transportation Injury Mapping System (TIMS) has been developed by SafeTREC's GIS Program team to provide quick, easy and free access to California crash data that has been geo-coded to make it easy to map out crashes and even view the locations in Google Street View.

The following tools are currently available on TIMS:

NEW! SWITRS Summary Weekly Crash Trends SWITRS Query & Map SWITRS GIS Map California Safety PM Target Setting Collision Diagram SRTS Map Viewer ATP Maps & Summary Data Motorcycle...

Strengthening Partnerships Peer Exchange Series

 A 2022 Peer Exchange Series for former CPBST sites

In the Spring of 2022, UC Berkeley Safe Transportation Research and Education Center (SafeTREC) and California Walks launched new 3-part training series, the “Strengthening Partnerships: A Peer Exchange Series for former CPBST sites.” The biweekly virtual series, which began on March 15,...

6/30 webinar: Applying the Safe System Approach to Pedestrian and Bicyclist Safety

June 14, 2022
Applying the Safe System Approach to Pedestrian and Bicyclist Safety

DATE: Thursday, June 30, 2022Graphic representing the adapted Safe System approach with a dark blue circle and six segments with overlaid white text and icons to show the six adapted principles and elements
10am - 11am PDT

SafeTREC's Grembek Provides Expert Testimony on AB 1909 to CA Senate Transportation Committee

June 16, 2022

On Tuesday, June 14, 2022 the California Senate Committee on Transportation held a hearing to discuss a series of measures around pedestrian and bicycle safety, public transportation, transportation planning and funding, and more. As part of the proceedings, SafeTREC Co-Director Offer Grembek provided expert testimony for AB 1909, the Bicycle Omnibus Bill.

AB 1909 Bicycle Omnibus Bill

The AB 1909...

New Publication: Learning the representation of surrogate safety measures to identify traffic conflict

June 14, 2022
New paper highlights a framework to identify traffic conflicts

Former SafeTREC Graduate Student Researcher and current Applied Scientist at Amazon Jiajian Lu has co-authored a new publication, "Learning the representation of surrogate safety measures to identify traffic conflict" with SafeTREC Co-Director Offer Grembek and Civil & Environmental Engineering Professor Mark Hansen in the journal Accident Analysis & Prevention.


Learning the representation of surrogate safety measures to identify traffic conflict

Jiajian Lu
Offer Grembek
Mark Hansen

Traffic conflict can be identified by the presence of evasive actions or the amount of temporal (spatial) proximity measures like time-to-collision (TTC). However, it is not enough to use only one kind of measures in some scenarios and it is hard to set a threshold for those measures. This paper proposed a method to identify traffic conflict by learning the representation of TTC and driver maneuver profiles with deep unsupervised learning and clustering the representations into traffic conflict and non-conflict clusters. We first trained a transformer encoder to encode sequences of...

Complete Streets Safety Assessments (CSSA)

SafeTREC is offering free Complete Streets Safety Assessments (CSSA) to California communities, including cities, counties, and school campuses with a population of over 2,500 people. CSSAs are comprehensive transportation safety assessments that focus on pedestrian and bicycle safety. They help local agencies identify and implement traffic safety solutions that lead to improved safety for all users of California’s roadways.

The CSSA program is funded by the California Office of Traffic Safety, through the National Highway Traffic Safety Administration. Up until 2018, the program...