Why Do Police Cars Have Numbers on Their Roofs?

Have you ever looked down from a bridge or from the top floor of a building and observed a police passing a car underneath? If so, you may have noticed a number written on the roof of the car. These numbers are often called air roof marks. Their goal is to make police cars instantly recognizable to authorities watching them from a helicopter or CCTV camera. Police cars are far from the only cars with aerial markings, and some of these numbers are not even visible to the naked eye.

Why do police cars have numbers on the roof?

Police cars have aerial markings on the roof – numbers and sometimes even letters – so they are recognizable from the air. This helps authorities identify which cars are police cars. But it also helps police officers in cars to communicate with aerial or CCTV.