A police car, police cruiser, squad car, radio car or patrol car is a vehicle used by police forces around the world to patrol, temporarily detain and transport individual criminal suspects. Use of the police car has largely replaced the tradition of officers or constables "walking a beat" in most jurisdictions. A police car is also sometimes called a cop car or cherry top.
Advocates of community policing have asked police departments to encourage constables to spend less time in their vehicles and more time walking the streets and interacting with the community. [wikipedia]