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highway traffic light sensor
Fei C
Fei C May 09, 2013
highway traffic light sensor

I've seen these sensors...

Often 1
Occasionally 1
Rarely 1
Never 0
What is it? 0
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Similar Photos: This is safety gate at the platform of Tokyo Metro (main subway in Tokyo).<br/>This gate opens automatically when the train comes. I suppose it's quite usual to find this kind of sensors everywhere. Bus stops are becoming really interactive in Madrid. NoClean Aquariums

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