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