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- DictionaryTraf·fic light/ˈtrafik ˌlīt/
noun
- 1. a set of automatically operated colored lights, typically red, amber, and green, for controlling traffic at road junctions and crosswalks.
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noun
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Traffic lights, traffic signals, or stoplights – also known as robots in South Africa and Namibia – are signaling devices positioned at road intersections, pedestrian crossings, and other locations in order to control the flow of traffic. Wikipedia