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Traffic lights

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mostoften | 09:32 Tue 07th Jun 2005 | Motoring
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What date were traffic lights first introduced?
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The first stop-go traffic signal was erected in London on 10th December 1868 and consisted of two semaphore arms and two gaslamps - one red, one green.

An electric traffic light was erected in the US around 1912 in Salt Lake City by the appropriately named Lester Wire.

http://encyclopedia.laborlawtalk.com/Traffic_light

14:52 Tue 07th Jun 2005

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