A police car (also called a police cruiser, police interceptor, patrol car, cop car, prowl car, squad car, radio car, or radio motor patrol (RMP)) is a ground vehicle used by police for transportation during patrols and to enable them to respond to incidents and chases. Passive visual warnings are the markings on the vehicle. Police vehicle markings usually make use of bright colors or strong contrast with the base color of the vehicle. Modern police vehicles in some countries have retroreflective markings which reflect light for better visibility at night