Results of the 2013-2014 National Roadside Survey of Alcohol and Drug Use by Drivers

The survey was conducted during 2013 and 2014 at a representative sample of 300 locations across the country. More than 9,000 drivers participated in the voluntary and anonymous survey. This was the fifth such survey on driver alcohol use conducted since 1973. This is the second such survey on the use of drugs that could affect driving, including both illegal and legal drugs.

Drug and Alcohol Crash Risk

A new study by NHTSA, the largest and most carefully controlled of its kind to date, examines the crash risk associated with alcohol and drug use by drivers. The study used a case-control methodology, a research method commonly used in medicine and social science for studying risk factors for disease or other negative outcomes.