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

Over the last four decades, the National Highway Traffic Safety Administration (NHTSA) and/or the Insurance Institute for Highway Safety (IIHS) conducted four national surveys to estimate the prevalence of drinking and driving in the United States. The first National Roadside Survey (NRS) was conducted in 1973, followed by national surveys of drivers in 1986, 1996, 2007, and now 2013–2014. These surveys used a stratified random sample of weekend nighttime drivers in the contiguous 48 States and collected data directly from drivers on the road. The 2007 NRS added procedures to the NRS for the first time to estimate the use by drivers of other potentially impairing drugs. Prior roadside surveys had only collected breath samples to determine breath alcohol concentration (BrAC). Due to developments in analytical toxicology, NHTSA determined it would be feasible in the 2007 and 2013–2014 surveys to determine driver use of a variety of potentially impairing drugs including illegal drugs as well as legal medications. In 2013–2014, NHTSA conducted the most recent National Roadside Survey of Alcohol and Drug Use by Drivers. This voluntary and anonymous study is the second to collect data on drug use, presenting the first opportunity to examine drug use trends on a national scale. The 2013–2014 NRS was designed to produce national estimates of alcohol and drug use by weekday daytime and weekend nighttime drivers. Thus, the use rates presented here are national prevalence rates calculated from the percentage of drivers using alcohol or drugs and adjusted with an appropriate weighting scheme.


  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References; Tables;
  • Pagination: 5p
  • Serial:
  • Publication flags:

    Open Access (libre)

Subject/Index Terms

Filing Info

  • Accession Number: 01555797
  • Record Type: Publication
  • Report/Paper Numbers: DOT HS 812 118
  • Created Date: Feb 10 2015 12:28PM