This is a common point of contention among heavy marijuana consumers: how dangerous is driving while high?

The safety concerns of driving drunk are inarguable — the totality of fatal accidents is evidence enough of that. Marijuana is a different matter, however; medical patients and longtime consumers functionality is more-or-less unchanged with consumption levels that could completely incapacitate a novice consumer.

So where does that leave enforcement?

Watch 3 stoned drivers, with varying cannabis experience, receive evaluation by a driving school instructor in the car as well as a police officer watching from afar.

The results are interesting to say the least, answering questions related to dangerous consumption levels and how enforcement can go about testing them.