Hugh Pickens writes "The Telegraph reports that street lights on thousands of miles of major roads in England will be dimmed during quiet periods to save money and reduce carbon emissions. The Highways Agency has already turned off the lights on more than 80 miles of the motorway network and will soon begin a survey of where this can be done on the 2,500 miles of A roads it controls. Nigel Parry, of the Institution of Lighting Professionals, says that technology enabled lights can be controlled individually and remotely. 'The idea is that when traffic is busy, such as during the morning and evening rush hour, you have them at their brightest. When the traffic disappears you can dim them. You can maintain safety and use half as much energy.'"