After California legalized the recreational use of marijuana, a city police department held a special training session to get officers up to speed on recognizing when a motorist might be driving while under the influence of weed. During the session an officer asked, “How are we supposed to distinguish a stoned driver from a drunk driver?”
The instructor replied, “The drunk driver will roll through a stop sign without even noticing it. A stoned driver will wait for the stop sign to turn green.”