New CAA Study Reveals High Collision Risk for Drivers Using Edible Cannabis

A recent study supported by the Canadian Automobile Association (CAA) highlights the significant impact of edible cannabis on young drivers and the associated risk of collisions. The research provides critical insights as authorities and safety advocates continue to address impaired driving across Canada.

The University of Saskatchewan-led study focused on drivers aged 19 to 30 who consumed 10 mg of THC in a controlled environment before operating a driving simulator. Participants’ driving performance was monitored at intervals of 90 minutes, 2.5 hours, 4 hours, and 6 hours post-consumption. The results showed measurable impairment even when participants believed they were “fine.”

Within just 90 minutes of consuming edibles, drivers demonstrated poor lane discipline, impaired speed control, slower reaction times, and an increased likelihood of collisions. Nearly one-third of participants crashed in the simulator, emphasizing the dangers of delayed THC onset from edibles. Unlike inhaled cannabis, edible THC can take longer to affect users, leading some to consume additional doses before realizing they are already impaired.

Police data underscore the study’s findings. In Toronto, drug-impaired driving accounts for approximately 10% of arrests, a figure that has remained stable in recent years. Furthermore, a CAA survey in Ontario found that 20% of drivers admitted to consuming cannabis before driving. The growing prevalence of “polyuse”—combining cannabis with alcohol or other substances—further elevates crash risk.

With the holiday season approaching, CAA stresses the importance of planning ahead and driving sober. The organization urges drivers to understand how edibles affect the body and to allow sufficient time for their effects to wear off before getting behind the wheel.

“Education and awareness are key to preventing impaired driving,” CAA said. “Understanding the delayed impact of edibles can save lives and reduce collisions on Canadian roads.”

By sharing research insights and promoting responsible choices, CAA aims to enhance road safety and reduce the incidence of impaired driving nationwide.