Aerial roof markings are symbols, letters, or numbers on the top of fleet vehicles to allow aircraft or closed-circuit television cameras to identify them from overhead. The purpose of these marking vary, but are generally used to identify a specific vehicle, vehicle type, operator, assignment, or role.
Aerial roof markings are symbols, letters, or numbers on the top of fleet vehicles to allow aircraft or closed-circuit television cameras to identify them from overhead. The purpose of these marking vary, but are generally used to identify a specific vehicle, vehicle type, operator, assignment, or role.
Source: Wikipedia "Aerial roof markings" · CC BY-SA 4.0
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