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Many traffic lights in Columbus use sensors to increase efficiency
Megan H9
Megan H9 May 09, 2013
http://blog.photoenforced.com/2010/12/how-do-red-light-cameras-work.html
Many traffic lights in Columbus use sensors to increase efficiency

I've seen these sensors...

Often 3
Occasionally 0
Rarely 2
Never 3
What is it? 0
1 Comment     8 Tags
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