http://www.dea.gov/driving_drugged.html
The Department of Transportation has published two studies examining the impact of marijuana on driving performance. Marijuana - the most widely abused illegal drug - slows a driver's perception of time, space, and distance.
ok i see! you still believe what the DEA tells you...it is not a reliable source of information, for your own information, try to look more about independant study...the reason i am telling this is the DEA would be the 1st agency to get it's budget cutted down if marijuana wasn't that devilish...
"slows a driver's perception of time, space, and distance"
but at what level? sleep depravation can be a lot worse affecting those perceptions of time space and distance...plus from personnal experience, i don't see where marijuana did affected my perceptions of space and distance? you are not hallucinating under it's influence you know, you just don't see life or don't hink the same way...and not in an extreme manner...