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Countdown clocks are triggered when a car is stopped at a light or when ppl want to cross(help reduce accidents) http://youtu.be/ItMKKWxmKKQ
Bryce S1
Bryce S1 May 04, 2013
Countdown clocks are triggered when a car is stopped at a light or when ppl want to cross(help reduce accidents) http://youtu.be/ItMKKWxmKKQ

I've seen these sensors...

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Occasionally 3
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