Kenzie's Korner: Driving while high (02:07)

Drunk driving and distracted driving may spring to mind when thinking of young drivers, but driving under the influence of marijuana may be a bigger problem than we'd like to think.

And as Jim Kenzie points out, with estimates claiming as much as 30 per cent of young people climbing behind the wheel high, it's important to know your limit.

This segment originally appeared on Episode 18 of Motoring 2014.