I am looking forward to beign able to purchase a self driving car. Once self driving cars are th norm, driving under the influence of any substance will no longer be a safety issue.

Easy. If I'm driving 10 mph under the limit, in the wrong direction, I'm stoned.

Well actually a lot has changed. It’s legal in many states now, with many more soon to follow. I also expect that the federal government will decriminalize it before long.
Any progress has certainly been slow af though….

That kind of study has already been done in Colorado. The drug-warriors don't like the results so they'll keep trying until they do. If police can't brutalize non-whites, how will they relieve their insecurity?

I used to ride my motorcycle to school most mornings stoned. I actually felt I rode better with a little buzz. I know the scenery was enhanced .

You think a stoned person should be allowed to drive with no penalty?

Why?

I am in favor of eliminating all laws against the sale, possession or use of marijuana. However I can save our Government some time and money. Don't bother with the study...... yes, a person who recently used pot would be an impaired driver. I know from experience. So what? A person who just drank alcohol to any extent is also impaired. Should be re-ban alcohol?

One other thing has also changed: a major political party has become a personality cult centered on a white supremacist, malignant narcissist bent on ending our democracy. That's new.