There are many types of Speed Camera. Not all Speed cameras Flash Truvelo Speed Cameras Truvelo system is steadily becoming more common and some parts of the UK now predominantly use this type of camera. Three white lines are painted just ahead of the Truvelo camera and there are strips in the road that register the speed of the passing vehicle and trigger the camera. By using an infra-red flash, the Truvelo camera avoids the flash that the rear Gatso cameras produce when a photograph is taken. This means that the driver doesn't see a flash but the camera can take a photograph of the driver, as well as the front of the vehicle. http://www.nopenaltypoints.co.uk/typesofspeedcameras.html P.S. Many Speed Cameras are digital and do not use film.. DulwichFox