Dewayne
Dear Dewayne: This isn’t an answer we can just pull out of our butt cracks for you. There isn’t enough science to sit on in order to give you an exact time frame, but our asses aren’t completely bare, either. Because cannabis impairment isn’t as easy to determine through breath and blood levels, law enforcement still doesn’t have an exact way of determining how high you really are, though advancements are being made in breath and blood testing to detect THC levels and determine when a driver last consumed.

A Colorado county sheriff measures a driver's impairment levels during a 2018 driving experiment that measures the skills of alcohol and cannabis users.
Thomas Mitchell
It all comes down to your tolerance and the potency of the cannabis. Still, we’d recommend waiting at least a couple hours after you toke before you think about driving, no matter what.
Send questions to [email protected].