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On my bike ride this morning, I took this picture of pavement sensors under the road that sense when to change the traffic light.
Jennifer C24
Jennifer Cowley Professor, City and Regional Planning May 05, 2013
On my bike ride this morning, I took this picture of pavement sensors under the road that sense when to change the traffic light.

I've seen these sensors...

Often 3
Occasionally 3
Rarely 3
Never 4
What is it? 0
1 Comment     13 Tags
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