Speed Camera 1
Speed Camera 1 : A camera attached to a speed measuring device (either mobile or fixed). The speed measuring device records the speed of vehicles and triggers the camera to take photographs of vehicles travelling above the speed limit. Some speed cameras are digital and online and can be set up to transmit information automatically back to a central controlling office. Other cameras are traditional wet film and require an operator to retrieve the information from the camera. Methods of measuring speed include the use of radar and laser guns, as well as devices which measure the time taken between vehicle wheels passing over piezo-electric loops, and (rarely nowadays) pneumatic tubes
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