NHTSA

Landmark Study Finds Marijuana Is Not Linked to Car Crashes

In "the first large-scale study in the United States to include drugs other than alcohol," NHTSA found that, once the data were adjusted for confounding variables, cannabis consumption was not associated with an increased probability of getting into an accident.

Traffic Report: No Increase in Drugged Driving

Claims that more drivers are operating vehicles under the influence of marijuana and other controlled substances are unsupported by federal data, according to the conclusions of a November 2014 paper published by the National Highway Traffic Safety Administration’s (NHTSA) Office of Behavioral Safety Research.