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smart city using alternative energy
Maryam P
Maryam P May 08, 2013
smart city using alternative energy

I've seen these sensors...

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Similar Photos: high technology sensor for testing car speed detection A sensor for senior citizen card for pedestrian crossing which enables longer time for crossing. Beginning Nov. 2012, these dashboard devices are detected by sensors & allow for toll road use at different access levels<br/><br/>credit: ABCnews

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