This Highway Tracks Random Bluetooth Signals To Estimate Travel Times

They city of Calgary, Alberta has recently installed a $400,000 traffic monitoring system on a stretch of highway known as the Deerfoot Trail. And to track the movement and progress of vehicles it monitors the Bluetooth signals coming from mobile phones, headsets, or built-in entertainment systems. More »

Source: http://feeds.gawker.com/~r/gizmodo/full/~3/arMf7_cDJ0I/this-highway-tracks-random-bluetooth-signals-to-estimate-travel-times

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