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thewaynehttp://www.wired.com/wired/archive/14.01/start.html?pg=8
"Warning: The next time you're watching the road, it might be watching you. The FBI, Department of Homeland Security, and Alabama Department of Transportation have tested a speed trap device that hides inside reflective lane markers. Made by UK-based Astucia Traffic Management Systems, the detection stud throws an infrared beam across the pavement and, when a car passes, gauges its speed by measuring how long the beam is interrupted. Meanwhile, a digicam records the license plate. The data is sent to a computer over a GPRS cell network, allowing for remote ticketing."
"Warning: The next time you're watching the road, it might be watching you. The FBI, Department of Homeland Security, and Alabama Department of Transportation have tested a speed trap device that hides inside reflective lane markers. Made by UK-based Astucia Traffic Management Systems, the detection stud throws an infrared beam across the pavement and, when a car passes, gauges its speed by measuring how long the beam is interrupted. Meanwhile, a digicam records the license plate. The data is sent to a computer over a GPRS cell network, allowing for remote ticketing."
