Concerns about higher rates of impaired driving on the unofficial marijuana holiday 4/20 seem to be overblown, according to a new study accepted for publication in the journal Injury Prevention. Some prior research has indicated that traffic fatalities spike on April 20—by as much as 12 percent—but the data supporting that claim has been limited … Continue reading Study Debunks Claim That Traffic Deaths Increase On The 4/20 Marijuana Holiday