What are those green lights on utility poles?

2006-12-31 05:48:40 · 2 answers · asked by spag 2 in Environment

Along with their companion amber and red lights, they control the flow of motor vehicle traffic.

31 DEC 06, 2001 hrs, GMT.

2006-12-31 06:57:15 · answer #1 · answered by cdf-rom 7 · 0⤊ 0⤋

It is only visual effect.

2006-12-31 05:56:46 · answer #2 · answered by Tuncay U 6 · 0⤊ 0⤋

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