Marijuana and Driving

Also see: "Drug Test Results and Accident Risks" from Cal NORML Guide to Interpreting Drug Test Results (August 2012)

  • Federal Report: Problems with Weed DUI December 08, 2014
  • NHTSA Official Affirms Little Is Known About Stoned Driving August 4, 2014
  • Stoned Drivers: The Case Against Panic; Pot prohibitionists undermine their own warnings about legalization and car crashes. Reason August 11, 2014
  • More Pot, Safer Roads: Marijuana Legalization Could Bring Unexpected Benefits Forbes, April 3, 2014
  • The Myth of California's Drugged Driving Epidemic East Bay Express January 13, 2014
  • Alcohol's role in traffic deaths vastly underreported, study shows Fox News, March 24, 2014
  • Should Per Se Limits Be Imposed For Cannabis? Humboldt Journal of Social Relations, 2013
  • THC Concentrations Don’t Predict Driving Impairment High Times, Oct. 2013
  • VIDEO: Drivers stoned on marijuana test their driving skills (February 2013)
  • Cannabis and psychomotor performance: A rational review of the evidence and implications for public policy Drug Testing & Analysis (September 2012)
  • Cal NORML Successfully Opposes Zero-Tolerance DUI Bill in 2012
  • California posted an impressive 11% decline in fatal auto accidents in 2010. This continues a strong downward trend that started in 2006. Fatalities are down 35% since then. The entire West Coast has experienced similar declines. Colorado also did well, posting a 6.5% in fatal accidents in 2010. As in California, this represents the lowest number of accidents since statistics began in 1994.
  • Driving, Worker Safety Not Affected by Legalization
    July 27, 2010 - A a careful review of the scientific evidence shows that fears about marijuana’s impact on road safety are unwarranted. There is no good scientific evidence that drug testing improves workplace safety.

  • New Studies Confirm: Marijuana a Lesser Driving Hazard than Alcohol - Drug urine tests unjustified.
  • Study Shows Marijuana Users are Safer Drivers
  • Review of accident studies shows marijuana not a major public highway safety hazard, refuting need for "zero-tolerance" DUI laws and bans on public use. Nonetheless, study shows marijuana use is linked to increased injury risk, confirming California NORML's advice to users.
  • Expert review of drug tests and per se "driving under the influence" limits.