This study examines the relationship between toxicological test results and performance on a battery of physiological and psychomotor measures used by law enforcement officers among drivers arrested for DUI.
This study quantifies the prevalence of marijuana involvement in fatal crashes in the state of Washington in years 2010 – 2014, and examines whether the prevalence changed after the legalization of recreational use of marijuana took effect in the state.
The purpose of this study was to provide estimates of the prevalence of self-reported driving under the influence of alcohol and marijuana, and related perceptions and beliefs among U.S. drivers ages 18 and older.
This document provides an overview of issues related to marijuana consumption, driving impairment and blood testing as well as the potential impacts of social and legal factors.
March 2016 // Research Brief PDF
The objective of this project is to identify and recommend strategies for improving state-level data on drugged driving by addressing the most significant barriers that impede state efforts to collect and compile such data.
This report presents the results of our annual Traffic Safety Culture Index survey, providing data on the attitudes and behaviors of the American public with respect to key traffic safety topics.
This study investigated the number of motor vehicle crashes, injuries, and deaths that occurred in the United States in years 2010-2014 in relation to weather conditions and roadway surface conditions.
This study provides updated estimates of the prevalence of self-reported drowsy driving based on data from a nationally-representative survey of drivers conducted in 2015.
November 2015 // Full Report PDF
This report examines behaviors observed in crashes of fleet vehicles captured on in-vehicle video cameras.
June 2015 // Full Report PDF
This study examines whether the Great Recession contributed to reductions in fatal crashes by disproportionately reducing the amount of driving done by groups of drivers that have greater rates of crash involvement.
May 2015 // Full Report PDF