Police car
Police cars are usually marked to identify them. There are two reasons for this: firstly, so that other drivers know to get out of the way of a police car that is rushing to an emergency incident, and secondly so that the car can be a deterrent to crime. Police cars also have sirens and flashing lights which are used when they rush to an incident. However, some police cars are unmarked, so that police can carry out work without being noticed.