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traffic signal
traffic light
signal light used for regulating traffic
Note 1 to entry: A three-colour set, with red, yellow/amber and green lights, is the common arrangement for the regulation of vehicular traffic.
Note 2 to entry: This entry was numbered 845-11-63 in IEC 60050-845:1987.
Note 3 to entry: This entry was numbered 17-1330 and 17-1328 in CIE S 017:2011.