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« on: May 31, 2009, 09:45:14 PM »
Kind of a silly question, but since traffic lights are different from state-to-state and city-to-city, I figured I'd post a topic to see how they are installed on your area.
Ours (in Lower Bucks) are mounted vertically, on mast-arm poles. Most of them were installed no earlier than the mid-late 90's, though there are still a few older ones hanging around here. Since 2000, newly installed signals have had LEDs on the red and green lights and eventually yellow, and in 2005 most of the existing signals had LEDs installed on them.
Here are a few examples: