Washington State Roadside Survey

Roadside surveys allow collection of data on alcohol- and drug-positive driving from drivers directly on the road – rather than from only self-report data or from select samples of drivers who have been in arrested or in a crash.There have been National Roadside Surveys spanning the last 40 years. These surveys have allowed us to examine trend data of alcohol-positive driving, and since 1997, also drug-positive driving. For example the 2013-20014 National Roadside Survey indicated a continued decrease in alcohol use and some increase in drug use. While these surveys provide a national snapshot, they do not provide information about particular States. Washington was one of the initial States to legalize recreational use of marijuana. This study is examining whether alcohol and drug use while driving, including use of marijuana, has changed since before legalization. Subjects, in representative sites across Washington, will be randomly chosen to participate in a voluntary and anonymous study. Subjects will be asked to provide a breath sample, an oral fluid sample, and a blood sample. Subjects may decline at any point.

  • Supplemental Notes:
    • See DOT HS 812 299 "Marijuana, Other Drugs, and Alcohol Use by Drivers in Washington State."


  • English


  • Status: Completed
  • Contract Numbers:


  • Sponsor Organizations:

    National Highway Traffic Safety Administration

    1200 New Jersey Avenue, SE
    Washington, D.C.  United States  20590
  • Project Managers:

    Berning, Amy

  • Performing Organizations:

    Pacific Institute for Research and Evaluation

    11720 Beltsville Drive, Ste 900
    Calverton, MD  United States  20705-3111
  • Start Date: 20110927
  • Expected Completion Date: 0
  • Actual Completion Date: 20160700
  • USDOT Program: Behavioral Safety Research
  • Subprogram: Alcohol Impaired Driving
  • Subprogram: Drug Impaired Driving

Subject/Index Terms

Filing Info

  • Accession Number: 01625568
  • Record Type: Research project
  • Source Agency: National Highway Traffic Safety Administration
  • Contract Numbers: DTNH22-11-C-000216
  • Files: RiP, USDOT
  • Created Date: Feb 6 2017 3:03PM