Transport General | 1970 | Sound | Colour
Policeman directing traffic with hand signals. Gives the drivers a message. Traffic lights. Pedestrian crossing signals warn drivers. A lighthouse warns ships about dangerous areas at sea. Horns of the ship warns other boats about there presence. Fire engines, ambulances, and police cars sirens perform a similar warning for traffic. Trains also sound signals for workers. Flag signals. Morse code signals.
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