Advocating for Evidence Based Marijuana Policy
Category Archives: Highway Safety
Marijuana use may double the risk of accidents for drivers, study finds
Source: (As reported in ScienceDaily, October 7, 2011) Columbia University’s Mailman School of Public Health. (2011, October 7). Marijuana use may double the risk of accidents for drivers, study finds. ScienceDaily. Retrieved May 20, 2014 from www.sciencedaily.com/releases/2011/10/111006173453.htm
Researchers have found that drivers who test positive for marijuana or report driving within three hours of marijuana use are more than twice as likely as other drivers to be involved in motor vehicle crashes. The researchers also found evidence that crash risk increases with the concentration of marijuana-produced compounds in the urine and the frequency of self-reported marijuana use.
M.-C. Li, J. E. Brady, C. J. DiMaggio, A. R. Lusardi, K. Y. Tzong, G. Li. Marijuana Use and Motor Vehicle Crashes. Epidemiologic Reviews, 2011; DOI: 10.1093/epirev/mxr017
Underage college men discount dangers of driving after marijuana use
Source: (As reported in ScienceDaily, May 14, 2014) University of Massachusetts at Amherst. (2014, May 12). Underage college men discount dangers of driving after marijuana use. ScienceDaily. Retrieved May 20, 2014 from www.sciencedaily.com/releases/2014/05/140512214039.htm
Underage male college students who report using marijuana in the month before they were surveyed had a high prevalence of driving under its influence and of riding with a marijuana-using driver, at a rate more than double that of driving or riding after alcohol use, say researchers.
Jennifer M. Whitehill, Frederick P. Rivara, Megan A. Moreno. Marijuana-Using Drivers, Alcohol-Using Drivers, and Their Passengers. JAMA Pediatrics, 2014; DOI: 10.1001/jamapediatrics.2013.5300
Acute cannabis consumption and motor vehicle collision risk: systematic review of observational studies and meta-analysis
BMJ 2012; 344 doi: http://dx.doi.org/10.1136/bmj.e536 (Published 09 February 2012) Cite this as: BMJ 2012;344:e536
Mark Asbridge, associate professor, Jill A Hayden, assistant professor, Jennifer L Cartwright, research coordinator 1Department of Community Health and Epidemiology, Dalhousie University, Halifax, Nova Scotia, Canada B3H 1V7
“Driving under the influence of cannabis was associated with a significantly increased risk of motor vehicle collisions compared with unimpaired driving. … Acute cannabis consumption nearly doubles the risk of a collision resulting in serious injury or death … “