How do digital fixed speed cameras work?
How do the cameras detect speed? The fixed speed cameras detect the speed of vehicles by using piezo electronic detectors embedded into the road surface. These piezo detectors deflect slightly when a vehicle is driven over the detectors, which then triggers an electronic device that accurately measures the speed of the vehicle. If the speed of the vehicle exceeds the legal limit then a digital picture is taken of the offending vehicle. Some fixed digital speed cameras also operate in conjunction with a measurement device known as a TIRTL which cross-checks vehicles’ speed using a pair of laser beams that are aimed across the road a few centimetres above the surface of the carriageway. What does the camera record? If a vehicle is detected speeding, a digital image of the vehicle is recorded onto a disk from which all details regarding the speeding vehicle can be extracted. The image usually shows the colour, type, make and number plate of the vehicle. Fixed digital speed cameras have th
