if by impair you mean improve then yes it impairs it

Im so much more focused driving when im stoned. I just make sure before I start driving I have a cd in that I wont have to take out. As long as I can just skip tracks im good cuz I zone out to the music and cruise. If I have to change cds Im liable to run off the road cuz at that time the music def takes precedence to cautious driving
Joe Paterno Reviewed by Joe Paterno on . Does Weed Impair Your Driving???? Do you think you drive better or worse when smoking? I don't think it makes much of a difference to me. I took part in a research study at Wake Forest Baptist Medical center on the effects of marijuana/driving/balance/sleep deprivation, and during the simulated driving portion, I did not hit any of the barriers that popped up, so I guess they were only testing reaction time. Here's the results of that study: ScienceDirect - Drug and Alcohol Dependence : Behavioral and subjective effects Rating: 5