Simple shapes, like a rectangle on a street sign, don’t carry urgency. A Stop sign does. In fact, the Department of Transportation’s Manual on Uniform Traffic Control adheres to a philosophy ...

Circular signs are used to give orders and usually hint at something you must or must not do. You should never ignore them, as doing something against traffic laws could lead to fines and license ...

You know the ones: they're red, strangely shaped — not quite circular or square, with the big, bold, white letters proclaiming STOP. Yes, stop signs. That means that your vehicle needs to stop.