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SF Park uses in ground sensors (they're embedded in the asphalt where cars will park) to monitor occupied and vacant parking spaces.
Brian S31
Brian S31 May 06, 2013
SF Park uses in ground sensors (they're embedded in the asphalt where cars will park) to monitor occupied and vacant parking spaces.

I've seen these sensors...

Often 1
Occasionally 4
Rarely 2
Never 8
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