A traffic stopper is a term used to describe a variety of methods used to control the flow of traffic. A DRAWBRIDGE is a type of bridge that can be raised or lowered to allow ships to pass underneath, pileup is when multiple vehicles become stuck in a traffic jam, a SIREN is a loud noise used to alert people of danger, a narc is a slang term for a police officer, PARADE is a procession of people or vehicles, AUTO is another word for car, RED is a color, redlight is a signal used to indicate when to stop, speedtrap is an area where police officers monitor speed limits, and crossingguard is a person who helps pedestrians cross the street safely.