I must agree Price. For someone to say that it doesn't effect you is unbelievable really.
It slows down reaction time and effects coordination significantly so let all the stoner drivers be really honest about it. It obviously depends on the amount and strength just like any other substance. There are numerous microinteractions involved in the very, very complex act of driving and these are affected by intoxicants such as alcohol or cannabis.
It may make a few drive slower but that's because they ARE stoned and slow...probably listening to their music too
and much, much likely not to be able to fully concentrate and more likely to go into their own world rather than a completely sober person.
Interestingly, I've seen a few Traffic Cop style programmes where the cops have correctly determined the substance of the driver they are following by the manner and traits of their driving which clearly demonstrates that certain substances has certain effects on driving ability.
Even in States in the USA where it is legal to smoke the drug driving limit is set very, very low - much, much lower than ours.
Many are set at 5ng so 5 parts per billion whereas ours is set in the thousands.
So let all the stoners and ex stoners be completely honest and not try and justify and differentiate themselves from others.
It does effect driving.
If it effects you when not driving how is it possible not to effect you driving???