AAA — Fatal crashes involving marijuana increase after legalization
(February 3, 2020) WASHINGTON, D.C. — A concerning number of Washington state drivers involved in fatal crashes are testing positive for recent use of marijuana, according to new research from the AAA Foundation for Traffic Safety. The share of drivers who, after a fatal crash, tested positive for active THC — the drug’s main psychoactive ingredient — has doubled since the state legalized marijuana in December 2012.