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hazard warning signal, <on vehicle>
light signal provided by the simultaneous operation of all the direction-indicator lights on a vehicle, and used to indicate that the vehicle constitutes a special hazard to other moving vehicles
Note 1 to entry: This entry was numbered 845-11-80 in IEC 60050-845:1987.
Note 2 to entry: This entry was numbered 17-520 in CIE S 017:2011.