Marijuana’s Effect on Driving
Difficulty paying attention
Difficulty staying in traffic lane
Slower reaction times
Difficulty judging distances
Reduced peripheral vision
A Worrying Trend in Washington State
Percentage of Washington drivers involved in fatal crashes who had recently used marijuana
Determining Impairment Isn’t Easy
1 “Trends in alcohol and other drugs detected in fatally injured drivers,” Brady, 2014.
2 “Acute cannabis consumption and motor vehicle collision risk,” Asbridge, Hayden, and Cartwright, 2013.
3 “Cannabis effects on driving skills,” Hartman and Heustis, 2013.
Information taken from “Fatal Road Crashes Involving Marijuana Double After State Legalizes Drug,” May 10, 2016, AAA Foundation for Traffic Safety.