[DiogenesLamp]

NHTSA contradicts you =>

Roadway deaths fall nearly 25 percent in a decade, fatality rates at a historic low

You don't remember that you were talking about Colorado, Washington, and Oregon? Colorado highway deaths were lower in the past.

What does it matter that Highway deaths may have declined in non Legal marijuana states? It has no bearing on the effect of legality in Colorado, regarding which it is too soon to assert any "effect".

[Ken H]

The point is that marijuana laws have dramatically loosened across the country in the last 2 decades => 23 states now have medical marijuana, and 3 states and DC have fully legalized. All along the way, prohibitionists claimed that highways would become deadlier.

As the numbers show, they were wrong. Highways got safer in both legal and non-legal states. The combination of multi-year loosening of pot laws and safer highways, knocks one of the main props out from under the prohibitionist case.