SPEED cameras that track drivers over long distances by measuring average speed are to be deployed on motorways, at accident black spots and in residential areas.
The Home Office is expected to grant approval for the technology in January. Ministers plan to install them as replacements for Gatso and Truvelo cameras, which measure speed over only a few yards, meaning that motorists can brake as they pass the cameras and then accelerate again. The new cameras can enforce the speed limit over stretches of up to six miles.
The average speed cameras work in pairs, monitoring the time each car takes to travel between two points. The system then calculates its average speed over that distance.