Perceptions of the Risk and Social Acceptability of Driving Under the Influence of Cannabis

Cannabis is the second most commonly used substance among Canadians for those 18 to 24 years old with the most prominent associated risk of driving under the influence. Cannabis consumption impairs executive functions necessary for driving and increases the likelihood of fatal motor vehicle crashes. The purpose of this study was to explore participant perceptions about the dangerousness and social acceptability of driving under the influence of cannabis (DUIC) compared to alcohol or while tired. Utilizing an experimental vignette design, participants (N = 453) were randomly assigned to one of six vignettes that varied on the substance used by a 22-year-old (cannabis, alcohol, no substance) and driver sex (male, female). Participants responded to a series of questions about the dangerousness and social acceptability of the driving behaviors described. A series of ANOVAs revealed a significant main effect of substance use across all items and a main effect of sex on social acceptability. DUIC was perceived as less dangerous and more socially acceptable than driving under the influence of alcohol. Furthermore, impaired driving was viewed as more acceptable for females than males. Findings help provide further insights into public perceptions of DUIC and highlight the importance of public education on the risks of DUIC.