Meanwhile Colorado reports quite honestly that DUI for marijuana is on a big increase there. There was/is apparently more pot heads than casual users than everyone thought, or the number of pot heads increased as casual use became legal. I suspect it was the latter.
Sounds like urban legend to me. Link?
“CDOT spokesman Sam Cole said the department considers the number of deaths in which the driver was marijuana-impaired under state law to be the most reliable indicator of its impact on the highways.
“By that measure, marijuana-related deaths are clearly down.”