This drowsy driving study quantifies a driver's relative risk of being involved in a crash in relation to the number of hours that they slept in the past 24 hours.
This report presents data on the proportion of U.S. residents who drive and the amount of driving that they did in years 2014-2015 based on the AAA Foundation's surveys of representative samples of households nationwide.
This study examines data from a sample of in-depth crash investigations to estimate the number of crashes, injuries, and deaths in the U.S. each year that are caused by debris on the roads or falling from vehicles.
This report provides data on the prevalence of self-reported aggressive driving behaviors based on a survey of a representative sample of U.S. drivers.
This study examined data from drivers involved in crashes and drivers suspected of DUI in Washington state.
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.