Please cite actual statistics and studies that prove cannabis impairment danger.

“ In seven of ten studies cited, cannabis use was associated with a decrease in driving speed despite explicit instructions to maintain a particular speed, whereas under the influence of alcohol, subjects consistently drove faster. Two simulator studies showed that the tendency to overtake was decreased with cannabis use but increased with alcohol.52, 53 One simulator study and two on-road studies examining car-following behavior concluded that cannabis smokers tend to increase the distance between themselves and the car in front of them.41, 45 Other studies have found no adverse effects of marijuana use on sign detection,49 a sudden lane-changing task,43 or the detection of and response to hazardous events.”

"Epidemiological studies have been inconclusive regarding whether cannabis use causes an increased risk of accidents; in contrast, unanimity exists that alcohol use increases crash risk" - direct quote from your link.

That study is about alcohol combined with cannabis (i.e. presuming effect then striving to find a cause).

Disclaimer: I have never been a cannabis user.

"marijuana smokers tend to compensate effectively for their impairment by utilizing a variety of behavioral strategies such as driving more slowly, passing less, and leaving more space between themselves and cars in front of them."

Do you have any proof that cannabis impairs driving?

Here is a good overview of dozens of studies that have performed on subject.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2722956/#S3titl...

The tl;dr is Cannabis absolutely impairs the core skills you use when driving, but also raises your awareness of your impairment so those under the influence tend to drive more cautiously. The result is in simulator studies cannabis shows a clear negative effect, but in functional studies, its more of a wash.

Please fully read and understand the resource you linked

> Experienced smokers who drive on a set course show almost no functional impairment under the influence of marijuana, except when it is combined with alcohol.

And the conclusion that the lack of functional impairment is due to increased awareness of impairment is merely speculation and is not based on any empirical result.

I don't even understand how this is a question in anyone's mind.

Because studies show that Marijuana results in no functional impairment in test courses? Maybe you should learn to trust data and science rather than just your preheld beliefs that aren't necessarily rooted in sound logic or reasoning.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2722956/#S3titl...

Have you never seen anyone super stoned before? What studies do you even need beyond that? Yeah there is a scale before people shouldn't be driving, and this device will help enforce that line. It may take time and work, but better than nothing.

Once again, your personal experience and anecdotes aren't necessarily reflective of reality. Personal anecdotes are the worst form of evidence there is. Read the actual study, so that you may learn something. Your miniscule personal experience is in no way rigorous.

The study contradicts your assertions and does so in a rigorous controlled study. Obviously that holds more weight than your anecdotes or statements that have no empirical or logical basis.

From the paper you linked

> Experienced smokers who drive on a set course show almost no functional impairment under the influence of marijuana, except when it is combined with alcohol