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Inteligent sempahores. We have at least 2 of them being tested on traffic jam avenues. They detect cars and can change before countdown ends
Andres S1
Andres S1 May 04, 2013
Inteligent sempahores. We have at least 2 of them being tested on traffic jam avenues. They detect cars and can change before countdown ends

I've seen these sensors...

Often 6
Occasionally 5
Rarely 2
Never 5
What is it? 1
2 Comments     19 Tags
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