Driving slowly in the fast lane is more than just annoying, it's also illegal in many states. Wanna know if your 45-mph, Buick-borne grandma is breaking the law on the interstate? Just consult our handy map.
The most popular law follows the Uniform Vehicle Code, which says a car driving below the "normal speed of traffic" should be driven in the right-hand lane. Because it indicates "normal speed" instead of saying "speed limit" a driver going above the speed limit but slower than most traffic is still in the wrong.