Training and education

Geocoding Police Collision Report Data from California: A Comprehensive Approach

Bigham, John M.
Rice, Thomas M.
Pande, Swati
Lee, Junhak
Park, Shin Hyoung
Gutierrez, Nicolas
Ragland, David R.


Collision geocoding is the process of assigning geographic descriptors, usually latitude and longitude coordinates, to a traffic collision record. On California police reports, relative collision location is recorded using a highway postmile marker or a street intersection. The objective of this study was to create a geocoded database of all police-reported, fatal and severe injury collisions in the California Statewide Integrated Traffic Records System (SWITRS) for years 1997-2006 for use by public agencies.


The Inclusion of Adult Vehicle Occupants in Matched Cohort Studies of Child Restraint Effectiveness: A Study of Potential Bias

Rice, Thomas M.
Anderson, Craig L.

Objective: To determine whether either the inclusion of adults in matched cohort studies of passenger vehicle occupants or modification of age effects by collision severity biases child restraint risk ratios biases estimate of child restraint effectiveness.

Bicycle Commuting Market Analysis Using Attitudinal Market Segmentation Approach

Li, Zhibin
Wang, Wei
Yang, Chen
Ragland, David R.

The market segmentation analysis for bicycle commuting can help identify distinct bicycle market segments and develop specific policies or strategies for increasing the bicycle usage in each segment. This study aims to use the approach of attitudinal market segmentation for identifying the potential markets of bicycle commuting. To achieve the research objective, the household survey is conducted to obtain the travelers’ attitudes towards their commuting travels. The factor analysis is used to explore the latent attitudes.

Rosemont CPBST: Wednesday, April 19

April 10, 2017

Join us on Wednesday, April 19 for another Community Pedestrian and Bicycle Safety Training (CPBST) at Einstein Middle School in Rosemont!

DATE/TIME: Wednesday April 19 ; 10AM- 3PM
LOCATION: Einstein Middle School - 9325 Mirandy Drive Sacramento, CA 95826

Teens and Driving in California: Summary of Research and Best Practices

Bui, Huong
Arnold, Lindsay S.
Cooper, Jill F.
Ragland, David R.

The purpose of this guide is to present the major risk factors associated with teen driving in California and to highlight policy and program strategies that may be influential in reducing risk.

Driver Behavior at Rail Crossings: Cost-Effective Improvements to Increase Driver Safety at Public At-Grade Rail-Highway Crossings in California

Cooper, Douglas L.
Ragland, David R.

This report examines conditions affecting vehicle-train collisions at rail crossings in California, and recommends effective countermeasures and implementation strategies. In doing so, the report helps meet California’s goal of efficiently utilizing state and federal funding available through SAFETEA-LU for increasing the safety at public atgrade rail-highway crossings.

Traffic Safety Among Latino Populations in California: Current Status and Policy Recommendations

Cooper, Jill F.
Wilder, Tammy R.
Lankina, Elena
Geyer, Judy A.
Ragland, David R.

This report summarizes the information gained from two community forums held in Latino communities in California, provides an analysis of trends in injury and demographic data, and reviews best practices for increasing safety and preventing injury in Latino populations. It highlights pressing traffic safety needs and presents recommendations. It is our goal that this report will serve as a prototype for policy, enforcement and program development to address traffic safety issues for Latinos in California.

Low Income Childhood Pedestrian Injury: Understanding the Disparate Risk

Johnson, Emily S.
Geyer, Judy A.
Rai, Nirmeet
Ragland, David R.

A leading cause of death and injury to children is being struck by a motor vehicle. A disproportionate number of injured child pedestrians are of low socioeconomic status. The relationship between socioeconomic status and pedestrian injury is poorly understood. The existing literature is limited by the lack of pedestrian exposure data, a common measure of risk, and a clear conceptual framework for the interaction between socioeconomic status and pedestrian injury. Another issue is the limited availability of injury data.

Vehicle Occupancy and Crash Risk

Geyer, Judy A.
Ragland, David R.

This study explores the association between vehicle occupancy and a driver’s risk of causing a fatal crash, not wearing a seatbelt, and using alcohol. The survey population is the set of drivers represented in the Fatal Analysis Reporting System (FARS) (years 1992 to 2002). The independent variables are driver age, driver gender, passenger age, passenger gender, and vehicle occupancy. The outcome variables are whether the driver was at fault in causing the fatal crash, whether the driver wore a seatbelt, and whether the driver had been using alcohol.