Cannabis-impaired Driving.

With cannabis now being legal, CAA is committed to raising awareness about its impact on road safety.

A blurred image of a road with cars.

As long-standing advocates for road safety, CAA is monitoring this unprecedented change and its impact across the province. Ensuring that road safety remains at the forefront and will continue to be part of CAA’s focus.

Effects of Cannabis While Driving.

The most common misconceptions out there are that cannabis doesn’t affect your driving or that it can actually make you a better driver. The reality is that drivers who use cannabis are at an increased risk of getting into a motor vehicle collision.

Cannabis is second only to alcohol as the drug most frequently found among drivers involved in crashes and drivers charged with impaired driving. It is also the drug most frequently mixed with alcohol usage in vehicle crashes.

Cannabis mixed with keys.

Driving While Under the Influence of Cannabis Affects Your:




Reaction time


Ability to pay




Ability to judge

Source: CAA National

New Impaired Driving Penalties in Effect.

In Ontario, it is illegal to operate any type of motor vehicle while under the influence of alcohol or drugs. This applies to all types of motor vehicles, including cars, trucks, boats, snowmobiles and off-road vehicles.

As of July 1, 2018, a zero-tolerance approach for alcohol and cannabis took effect for young, novice and commercial drivers.

Learn More
Police officer stopping a vehicle.

Public perception of
marijuana-impaired driving.

What Do Ontario Drivers Think?

A 2017 report commissioned by CAA South Central Ontario found that a majority of Ontario drivers believe there will be an increase in the frequency of marijuana-impaired driving. The report indicates that many people think that there may be more collisions due to cannabis use once it is legalized than is currently the case as a result of alcohol or distracted driving.

Learn More

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Plan a Safe Way Home.

Many illegal and prescription drugs can impair a person’s capacity for driving by reducing the ability to divide attention and allocate concentration. It can also result in poor time and space management. Make sure you’re prepared with alternate ways to get home.

You Have Options:


Have a designated

Call a friend or
loved one


Call a cab or


Take public


Stay over and
sleep it off

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Other Helpful Resources.