Data collection

June 11, 2024: SafeTREC's Griswold and Oum to present at OTS Traffic Safety Law Enforcement Forum

June 5, 2024
Upcoming forum to highlight the importance of traffic safety throughout CaliforniaCalifornia Office of Traffic Safety Logo

On June 11, 2024 SafeTREC's Director Julia Griswold and Associate Director SangHyouk Oum will present on key traffic safety topics at the ...

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 crashes, near-misses, general hazards and safe locations to travel. To promote access to the tool, SafeTREC conducts technical assistance with communities and...

Explore our new California Traffic Safety Dashboard

April 2, 2024

UC Berkeley SafeTREC is excited to announce the launch of our new California Traffic Safety Dashboard, a series of tools designed to allow users to visualize crash data and traffic safety activities in conjunction with demographics in California.

California Traffic Safety Dashboard - do your own analysis or visualize traffic safety at a glance

The following Tools are currently available:


Traffic Safety and Equity Overview
The Traffic Safety...

Register now for 4/17 Street Story webinar: “I have the data, now what?” Pt. 2

March 26, 2024
I have the data, now what? Part 2Eight people conducting a walk assessment on a neighborhood sidewalk during a Street Story training in Boyle Heights Wednesday, April 17, 2024 | 1pm - 2pm PT | Register now

Register now for SafeTREC...

Street Story: How can we create inclusive community engagement technologies?

November 1, 2018

During the California-wide PedsCount! Summit 2018, we launched Street Story, SafeTREC’s new community engagement platform that allows residents, community groups and agencies to collect information about transportation collisions, near-misses, general hazards and safe locations to travel. In essence, the platform invites users to enter ...

March 15: Using Crowdsourced Data Strategies in Community Engagement

February 28, 2022

Community members at a walking and biking safety training filling out a Street Story survey about their transportation safety experiences, with the title of the Peer Exchange session on 3 stacked color boxes in orange, yellow and blue

UC Berkeley Safe Transportation Research and Education Center (SafeTREC) and California Walks are...

SafeTREC Co-Directors David Ragland & Offer Grembek present at ATSIP 2021 Virtual Traffic Records Forum

September 14, 2021
SafeTREC's Ragland and Grembek present at 2021 ATSIP Traffic Records Forum ATSIP Traffic Record Forum 2021

This year the Association of Transportation Safety Information Professionals (ATSIP) held their annual Traffic Records Forum virtually from August 16-20, 2021 to convene data analysts, state and local law enforcement officials, engineers, motor vehicle officials, emergency...

“Office Hour” with the Street Story Team

July 27, 2022
Do you have questions about how to enter Street Story data, analyze data from your community, create a custom boundary - or other questions about using the tool? How about using the paper version or simply entering reports?

Screenshot of the StreetStory website

Join the UC Berkeley ...

Investigating Bicyclists' Perception of Comfort on Physically Separated Bicycle Paths in Nanjing, China

Li, Zhibin
Wang, Wei
Liu, Pan
Schneider, Robert J.
Ragland, David R.

Providing bicyclists favorable and comfortable riding environments is an important objective for transportation professionals. This study investigated the factors that contribute to bicyclists' perception of comfort on physically separated bicycle paths and quantified their impacts. A survey was conducted on 29 physically separated bicycle paths in the metropolitan area of Nanjing, China. A factor analysis and an ordered probit model were used to analyze the data. The results showed that the mean perception of comfort was significantly different between age groups, but not...

Consequences of Driving Reduction or Cessation for Older Adults

Harrison, Ayodele
Ragland, David R.

The purpose of this study was to understand the adverse consequences of driving reduction or cessation among elderly adults. A comprehensive literature search was conducted for studies that (a) included information on driving by an elderly population, (b) included results from a qualitative or quantitative (or both) study of the elderly and driving cessation, and (c) provided information to evaluate consequences surrounding driving reduction or cessation. The selected subjects of the studies included men...