Cannabis Impaired Driving

Driving High is Driving Impaired

CAA has worked for decades to raise awareness about the dangers of driving impaired.

Now that cannabis is legal in Canada, we want to make sure everyone uses it responsibly. Make a plan, and don’t drive high. 

Do anything but drive

Myths about cannabis and driving

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Cannabis doesn’t affect my ability to drive

False. Driving under the influence of cannabis affects your ability to drive safely and you’re at a greater risk of getting into a collision.

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I’m not going far so it’s okay

False. 45% of incidents happen near the home. Driving in a familiar setting makes drivers less attentive, and cannabis has been shown to reduce a driver’s concentration.

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Police can’t check if I’ve consumed weed

False. Police officers across Canada can administer roadside tests to check for impairment. These can include testing devices or calling in specially trained drug recognition officers.

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Research into effects of cannabis on driving

Young Canadians are at risk of a vehicle crash even five hours after inhaling cannabis, according to a CAA-funded study conducted at McGill University.

The research found that driving performance declined significantly, in key areas such as reaction time, even five hours after inhaling the equivalent of less than one joint. The participants’ driving performance, tested in a driving simulator, deteriorated as soon as they were exposed to common road distractions.

Download study

Top negative driving effects of cannabis

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Reaction time

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Decision accuracy

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Ability to stay in lane

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Ability to avoid obstacles

Do you have questions about the dangers of driving high?

You can find the answers on our frequently asked questions page. Inform yourself and help educate others on the implications of impaired driving.

Find your question