Authors
Kelley-Baker, T., Berning, A., Ramirez, A., Lacey, J. H., Carr, K., Waehrer, G., Compton, R.
Publisher
National Traffic Safety Administration
Website Section
Driver Behaviors
Method
Roadside survey
Abstract
This document describes a nationally representative roadside survey to estimate the prevalence of alcohol and other drug use among drivers. Drugs studied included 98 over-the-counter, prescription, and illegal substances. Drivers were randomly selected at 60 sites across the United States. Participation was voluntary and anonymous. Results were compared to the 2007 National Roadside Study. Using data from both oral fluid and blood samples, overall, 22.3% of daytime drivers and 22.5% of nighttime drivers were drug-positive. Delta-9-tetrahyrdacannabinol (THC) was the most frequent drug, with 8.7% of daytime drivers and 12.7% of nighttime drivers testing positive. When comparing the 2013-2014 results to the same drugs tested for in 2007, an increase in nighttime drug prevalence was found.
Reference
Kelley-Baker, T., Berning, A., Ramirez, A., Lacey, J. H., Carr, K., Waehrer, G., Compton, R. (2017). 2013-2014 National Roadside Study of alcohol and drug use by drivers: Drug results. DOT HS 812 411. Washington, DC: National Highway Traffic Safety Administration.
Related Topics
Impair, impaired, DUI, zero, blood alcohol concentration, BAC, alcohol, drinking, drug, marijuana, opioids, influence, driving under the influence
2013-2014 National Roadside Study of Alcohol and Drug Use by Drivers
