Driving While Stoned

CNN affiliate KIRO tested drivers who had smoked marijuana. Something that never occurred to me is how states with varying levels of legal marijuana use have to establish limits on how much would make you legally ineligible to drive a vehicle. They have, and if these test subjects are any indication, you'll probably need several times the legal limit before police will observe you driving erratically. That said, you should never operate a vehicle, or any heavy machinery, while impaired, legally or not. (via reddit)