Cannabis impairs your concentration, judgement, coordination, ability to judge distance and slows your reaction time and decision making abilities. Effects can last 1-12 hours or longer, depending on the person, the product used and the way it was used (smoked/vaped vs edibles).
Driving under the influence of cannabis may double the risk of being involved in a crash. This risk for serious collisions increases even more when cannabis is mixed with alcohol.
It is illegal to drive while impaired by drugs or alcohol. There is zero-tolerance for young, new or commercial drivers. Currently, police officers certified as Drug Recognition Evaluators (DREs) can evaluate a driver’s behaviour for impairment and can request a blood, urine or oral fluid sample for testing. Conviction of driving while impaired by cannabis carries the same criminal offence and charges as alcohol-impaired driving.