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Why are there numbers for police cars on their roofs?

Have you ever looked down from a bridge or from the top floor of a building and saw a file police Driving the car below? If so, you may have noticed a number embossed on the roof of the vehicle. These numbers are often called air roof signs. Their purpose is to make police cruisers instantly recognizable to authorities watching from a helicopter or CCTV camera. Police cars are far from the only air-marked vehicles, and some of these numbers are not visible to the naked eye.

Why are there numbers for police cars on their roofs?

Police cars have aerial roof markings – numbers and sometimes letters – so they can be identified from the air. This helps authorities determine which cars are police cruisers. But it also helps police in cars communicate through air support or CCTV.

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