The Bluetooth channel is used for data transmission for a limited amount of data; the channel is efficient and cost effective. Bluetooth communication is used by mobile telephones, hands-free sets, GPS navigators and more. All these Bluetooth emitting devices leave a unique digital footprint. As the vehicles circulate the Bluetooth Sensor will pick up these signals and track the path of the vehicles. With a significant percentage of the passing vehicles providing a Bluetooth signal the sensors will provide an accurate traffic information
