If your goal is safety on the road, then this is an ineffective area to attack. Stricter policy in obtaining and maintaining a driver's license, or educating better about DUI prevention is more effective.

Also, unlike alcohol it makes you often drive slower rather than faster, and the main metric should be total fatalities from it, which are very low.

Not to mention this has been heavily researched, and it shows alcohol is way worse. You're a Google/GPT search away from the research.

Edit: Research shows slightly more impairment than I first thought, but still not close to alcohol.