> Right now, there is none. ... a person going out on the weekend and smoking a lot (much like drinking most weekends or occasionally) is going to be really impaired.
I think the article is pretty misleading but the conclusion is clear: "There's plenty of evidence showing that marijuana use impairs key driving skills. If you get really stoned and then get behind the wheel, you're asking for trouble.".
The problem is that the legal thresholds for THC are so low that "stone drivers" are not actually stone, making the whole federal study flawed.
Here: "Several states have passed laws attempting to define "marijuana-impaired driving" similarly to drunk driving. Colorado, for instance, sets a blood THC threshold of 5 nanograms per milliliter. But that number tells us next to nothing about whether a person is impaired or fit to drive. "
If you look at the data, "any illegal drug" is also not correlated with more accidents.
> but the conclusion is clear: "There's plenty of evidence showing that marijuana use impairs key driving skills. If you get really stoned and then get behind the wheel, you're asking for trouble.".
While the conclusion is clear, it's also misleading. No one disputes that you can get too stoned to drive, that isn't the issue that matters. What matters is whether those too stoned to drive drive anyway like they do on alcohol. Anecdotally from decades of experience I can say they don't, pot doesn't destroy your ability to judge your state of mind so there's no reason to treat it with special exceptions like we do for alcohol. Most long term smokers drive while high, but not while impaired. High != impaired just as drinking one beer doesn't destroy your ability to drive safely.
5ng/ml is absolutely ridiculous. 5ng/ml is down in the noise of even a very sensitive test, and waaaay under the noise floor for more common EMIT tests. That's a law meant to let a prosecutor throw anyone under the bus when he wants to.
I think the article is pretty misleading but the conclusion is clear: "There's plenty of evidence showing that marijuana use impairs key driving skills. If you get really stoned and then get behind the wheel, you're asking for trouble.".
The problem is that the legal thresholds for THC are so low that "stone drivers" are not actually stone, making the whole federal study flawed.
Here: "Several states have passed laws attempting to define "marijuana-impaired driving" similarly to drunk driving. Colorado, for instance, sets a blood THC threshold of 5 nanograms per milliliter. But that number tells us next to nothing about whether a person is impaired or fit to drive. "
If you look at the data, "any illegal drug" is also not correlated with more accidents.