I think they also have new technology now because of the legality to actually test for certain levels of the psychoactive elements of pot in the blood, so maybe

I think they also have new technology now because of the legality to actually test for certain levels of the psychoactive elements of pot in the blood, so maybe people are actually driving while high LESS (per user, not overall). I suspect we're not going to see truly useful or significant data for years, if not decades.