How do fixed digital speed cameras work?
Fixed digital speed cameras are made up of two different parts, one being the camera itself and the other being the speed measuring device. The speed measuring device uses piezo-electronic detectors embedded in the road surface to measure the speed of the vehicle. When a vehicle drives over these detectors an electronic device is triggered and the speed of the vehicle is measured. If the speed of the vehicle exceeds the legal speed limit, digital images are taken of the offending vehicle by the camera recording device installed at the site. The majority of fixed digital speed cameras are bi-directional. This means that a fixed digital speed camera can take digital images of offending vehicles on both sides of the road, traveling in different directions. Fixed digital speed cameras are able to identify the lane and direction of travel of a speeding vehicle. It is important to note that piezo-electronic detectors are lane specific, ensuring a speeding vehicle is correctly identified.
