Data collection

Observational Survey of Cell Phone Use and Texting by California Drivers, 2011

Cooper, Jill F.
Ragland, David R.
Ewald, Katrin
Wasserman, Lisa
Murphy, Christopher J.
2012

This methodological report describes survey research and data collection methods employed for the first observational survey of cell phone use and texting by California drivers. This study was conducted by Ewald and Wasserman Research Consultants on behalf of the California Office of Traffic Safety and the Safe Transportation Research and Education Center at the University of California, Berkeley. The goal of the survey was to obtain a statewide, statistically representative observational sample. Vehicle drivers were observed at controlled intersections, such as traffic lights and stop...

Reasons Given by Older People for Limitation or Avoidance of Driving

Ragland, David R.
Satariano, William A.
MacLeod, Kara E.
2002

Purpose: To understand the driving behavior of older adults, this study examines self-reported reasons for driving limitation or avoidance.Design and Methods: Baseline interviews were conducted (n = 2,046) as part of a community-based study of aging and physical performance in persons aged 55 years or older in Sonoma, California. Twenty-one medical and nonmedical reasons for limiting or avoiding driving were examined by age and gender. Results: Most older people continue...

Classification of Bicycle Traffic Patterns in Five North American Cities

Miranda-Moreno, Luis
Nosal, Thomas
Schneider, Robert J.
Proulx, Frank R.
2013

This paper analyses bicycle ridership patterns using a unique database of automated bicycle counts from approximately 40 locations in five North American cities and along the Route Verte in Quebec. The cities involved in this study are Montreal, Ottawa, Portland, San Francisco, and Vancouver. Count data show that the bicycle volume patterns at each location can be classified as utilitarian, mixed utilitarian, recreational and mixed recreational. Study locations classified into each of these categories are found to have consistent hourly and weekly traffic patterns, despite important...

A Multidimensional Clustering Algorithm for Studying Fatal Road Crashes

Fishbain, Barak
Grembek, Offer
2014

Road fatalities are rare outcomes of events that occur in a small time-space region. Although the exact chain of events for each fatality is unique, there are inherent similarities between road fatalities. The science of road safety is dedicated to identifying such similarities, mainly using statistical analysis tools. Researchers typically analyze patterns that emerge over space, such as hot-spot studies, or patterns that emerge over time, such as before-after studies. Traffic research enumerates 84 parameters that characterize a road fatality. A vast number of papers have tried to...

Applications open soon for the 2024 Community Pedestrian and Bicycle Safety Program!

December 5, 2023
Submitted by Lisa Peterson

Graphic showing participants on a walk audit with a light blue filter and CBPSP program launch announcement in white text

The 2024 CPBSP

UC Berkeley SafeTREC and California Walks are excited to announce the upcoming January launch of our 2024 Community Pedestrian and Bicycle Safety Program (CPBSP)!

The...

New Podcast Episode: The Future of Transportation Safety

November 28, 2023
Submitted by Lisa Peterson

People walking, biking across an intersection on Hollywood Blvd. in Los Angeles on a sunny day

For many of us, we might think of transportation as a means to safely get from one place to another, but it's much more than that. Transportation is also having access to the basic needs and activities of our lives, and it's a critical factor that influences people's health and the health of our communities...

11/16 at UC GIS Week 2023: Traffic Safety in California: Advancing Equity by Identifying At Risk Communities with ArcGIS

November 10, 2023
Submitted by Lisa Peterson

Outreach graphic for the UC GIS Week 2023 event with an image of a sea monster on a dark beige background

Traffic Safety in California: Advancing Equity by Identifying At Risk Communities with ArcGIS Thursday, November 16, 2023 | 1pm - 1:35pm

Join SafeTREC Research Data Analyst Amalia Stahl for the presentation, "Traffic Safety in California: Advancing Equity by Identifying At Risk...

SafeTREC at the 2023 California Traffic Safety Summit - register now

October 26, 2023
Submitted by Lisa Peterson

Event graphic with the OTS and AAA logos to the left, and "California Traffic Safety Summit, November 7-8, 2023, Hyatt Regency Orange County to the right

Power of Data to Transform Roadway Safety Wednesday, November 8, 2023 | 10:45am - 12:15pm

Join SafeTREC Safety Data and Tools Lead and Acting Co-Director SangHyouk Oum for the panel session, "Power of Data to Transform Roadway Safety" on...

Tribal Transportation Safety Assessment (TTSA)

Tribal Transportation Safety Assessment (TTSA)

Participants conducting a needs assessment in Happy Camp, 2019

Needs assessment for the Karuk Tribe (Happy Camp, 2019)

UC Berkeley SafeTREC is inviting 12 California Tribes to apply for the next round of Tribal Transportation Safety Assessments (TTSAs) to be completed by September 30, 2023. TTSA studies will be based on the Tribal communities'...

9/12 Webinar: Street Story and Perceptions of Safety

September 5, 2023
Submitted by Lisa Peterson

Participants in the CPBST at Westmont High School conducting a walk and bike assessment

Participants conducting a walk and bike assessment near Westmont High School in San Jose, CA

Street Story and Perceptions of Safety Tuesday, September 12, 2023 | 1pm PT |...