According to a study on Wednesday, U.S. data has shown for the first time drivers killed in crashes were more likely to be on drugs than drunk. The study adds that marijuana was involved in more than a third of fatal accidents in the year 2015. According to the report by the Governors Highway Safety Association and the Foundation for Advancing Alcohol Responsibility, forty-three percent of drivers tested in fatal crashes around the United States in 2015 had used a legal or illegal drug.