On the far right we can see that, as of 2017, almost a quarter of all drivers involved in fatal accidents had at least some level of Delta-9 THC (the main psychoactive ingredient) in their bloodstream. And it appears to be getting worse.
On the far right we can see that, as of 2017, almost a quarter of all drivers involved in fatal accidents had at least some level of Delta-9 THC (the main psychoactive ingredient) in their bloodstream. And it appears to be getting worse.
BLUF: Though more people drive under the influence of cannabis than alcohol, those individuals impaired by alcohol are 10X as likely to cause a fatal accident as someone impaired by cannabis.
“The proportion of persons driving under the influence of alcohol is estimated at 2.1% (95% CI: 1.4–2.8) and under the influence of cannabis at 3.4% (2.9%-3.9%). Drivers under the influence of alcohol are 17.8 times (12.1–26.1) more likely to be responsible for a fatal accident, and the proportion of fatal accidents which would be prevented if no drivers ever exceeded the legal limit for alcohol is estimated at 27.7% (26.0%-29.4%). Drivers under the influence of cannabis multiply their risk of being responsible for causing a fatal accident by 1.65 (1.16–2.34), and the proportion of fatal accidents which would be prevented if no drivers ever drove under the influence of cannabis is estimated at 4.2% (3.7%-4.8%).”
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5678710/