So the article which reports a large-scale study about the fact that "fewer Americans are drinking and driving; more are using drugs" and doesn't mention fatalities is a distraction from your later post about your unrelated theory of "deadlier highways" and not the other way around?
This is transparently ridiculous. Well, I tried to help, but I might have been wrong about giving you the benefit of the doubt regarding your sincerity of "not understanding" the basic concepts and issues.
Another fail =>
"The rising prevalence of marijuana and other drugs is a challenge to everyone who is dedicated to saving lives and reducing crashes," said NHTSA Administrator Mark Rosekind.