To quickly draw attention to the transport of special services, flashing lights have long been used – red, blue and orange are used to this day. But until the late 1980s you could also encounter a green flash.
It was used on traffic police cars to indicate a car closing off an organized convoy of vehicles.
It was later decided that this color is quite rarely used in practice and that standard red-blue flashing lights are sufficient in such cases.
Mikhail Kolodochkin has been collecting unusual facts from the history of technology for many years. For example, did you know why Soviet trolleybuses were called LK?
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