Pedestrian Safety

Vulnerable Road User Safety

SafeTREC research in progress

Explore our current research projects on vulnerable road user safety.



Bicycle Crash Corridors

Figure 2 of heatmap of corridors

Media Narratives of Pedestrian & Bicyclist-Involved Crashes

May 20, 2020

UC Berkeley SafeTREC is excited to share a new research highlight by graduate student researcher Marta Polovin, "Media Narratives of Pedestrian & Bicyclist-Involved Crashes."

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 resource: CPBST Program Workshop Follow-Up Survey Highlights

April 28, 2020

According to the latest traffic safety data from the California Office of Traffic Safety (OTS), while traffic fatalities have decreased 8.3% from 3,884 in 2017 to 3,563 in 2018, the safety for those walking and biking in our communities continues to be a concern. In 2018, there were 893 pedestrian fatalities (a 5% decrease from 2017) and 155 bicyclist fatalities (an increase of 6.89% from 2017).

New Features Added to Street Story Tool

April 20, 2020

Exciting news! Features around micromobility and infrastructure improvements have been added to UC Berkeley SafeTREC’s Street Story, an online 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. This information is publicly accessible in downloadable maps and tables, and can be easily recorded and shared with community partners.

Pedestrian Crash Hot Spots

Identification Methods for Pedestrian Crash Hot Spots


Research Team:

Dr. Aditya Medury
Dr. Offer Grembek


Funding Organization:

California Department of Transportation (Caltrans)

Exposure Modeling

SafeTREC research in progress

Explore our current research projects on exposure modeling.


California SHS Pedestrian Exposure Model

Figure of direct demand modeling process

Expansion Factors

Expansion Factors


Research Team:

Julia B. Griswold
Aditya Medury
Louis Huang
Robert J. Schneider
Offer Grembek

Funding Organization:

California Department of Transportation (Caltrans).


Publications and Resources:

  • Griswold, J. B., Medury, A., Schneider, R. J., & Grembek, O. (2018). Comparison of pedestrian count expansion methods: land use groups versus empirical clusters. Transportation research record, 2672(43), 87-97.

California SHS Pedestrian Exposure Model

California SHS Pedestrian Exposure Model


Research Team:

Julia B. Griswold
Aditya Medury
Robert J. Schneider
Dave Amos
Offer Grembek

Funding Organization:

California Department of Transportation (Caltrans).


Publications and Resources:

  • Griswold, J. B., Medury, A., & Schneider, R. J. (2011). Pilot models for estimating bicycle intersection volumes. Transportation research record, 2247(1), 1-7.