Anonymous Wireless Address Matching (AWAM) takes the individual MAC address on Bluetooth-enabled systems such as phones, hands-free devices, computers, and even Sony PSP Go gaming devices and tracks them as they enter a roadway equipped with a sensor.
If you've got your iPhone in your pocket and you drive along Interstate 45 leaving downtown Houston the system records a version of your MAC address.
How wireless devices are fighting traffic - Technology & science - Wireless - msnbc.com
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Joe
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