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Lower risk guidelines / Cannabis & Driving


Risk of Accidents

Studies have shown that cannabis use has reportedly doubled the risk of being involved in motor vehicle crashes (1,2).




  • Impairs complex functions such as interpretation & anticipation of traffic patterns (3)

  • Drunk drivers tend to drive faster & more aggressively (3)

  • Impairs automated functions such as tracking ability & monitoring the speedometer (3)

  • Stoned drivers tend to drive too slow, which is a danger itself! (4)

Both lead to increased risk of accidents:


Lower-risk guideline

What should you do after using cannabis?

Can you guess?

Page References:

  1. Asbridge, M., Hayden, J. A., & Cartwright, J. L. (2012). Acute cannabis consumption and motor vehicle collision risk: systematic review of observational studies and meta-analysis. BMJ, 344. doi:10.1136/bmj.e536 

  2. Li, M. C., Brady, J. E., DiMaggio, C. J., Lusardi, A. R., Tzong, K. Y., & Li, G. (2012). Marijuana Use and Motor Vehicle Crashes. Epidemiologic Reviews, 34(1), 65–72. doi:10.1093/epirev/mxr017.

  3. Brubacher, J. R. (2011). Cannabis and motor vehicle crashes. BCMJ, 53(6), 292-3.

  4. , 10(3), 269-279. Journal of Medical ToxicologyNeavyn, M. J., Blohm, E., Babu, K. M., & Bird, S.B. (2014). Medical Marijuana and Driving: a Review. doi:10.1007/s13181-014-0393-4.

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