3 ms·
So, we have "impairs key driving skills" versus "no statistically significant change in the risk of a crash". It sounds a bit like in vitro vs. in vivo results.
by mcbits 10y ago
So, we have "impairs key driving skills" versus "no statistically significant change in the risk of a crash". It sounds a bit like in vitro vs. in vivo results. At the end of the day, I'm more concerned about risk factors that actually lead to accidents on the roads.
Why doesn't "key driving skill" impairment from marijuana appear to increase the risk of a crash? My best guess is that stoned drivers are concerned about being pulled over and are able to compensate more than 1) someone impaired but not aware/concerned enough to compensate (e.g. tired or distracted drivers) or 2) someone worried about getting pulled over but unable to compensate as well for their impairment (e.g. drunk drivers).
- notahacker 10y agoI suspect drivers under the influence being cautious is a factor. I suspect majority of drivers testing positive for cannabis were not actually remotely close to being stoned at the time they were driving plays a huge role too (possibly also overzealous demographic controls). That's consistent with the study authors' observations that other studies based on accidents which rely on self-reported cannabis use show it to have a large effect on accident rates, and studies which rely on testing to show it has little or no discernible impact on accident rates. They consider the studies relying on testing to be superior in construction. Based on the well-established fact that cannabis use tends to show up in standard tests days after its main effects have worn off, I beg to differ.