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It is the button one pushes to activate the crosswalk signal, but just if the device is connected to the traffic light...
Antonella D
Antonella D Mar 16, 2015
It is the button one pushes to activate the crosswalk signal, but just if the device is connected to the traffic light...

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Similar Photos: Anemometer and mini wind turbine on a building Not really a static sensor, but it helps me to get around faster during rush hours and in general.. if I ever use the car. Sensors in the road tell drivers if there are any traffic backups.

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