Precisely what I have been advocating for 15 years, as used successfully in Spain, Portugal and other countries, but with the addition of cameras on the red lights. Doesn't damage vehicles. Keeps speeds down right through the village. Only punishes the deliberate transgressors. Studiously ignored by the administration which only seems to react when there is revenue greater earning potential, or something in it for somebody, like speed cushions at £500 a hump or the fantastically expensive yet redundant ‘ramp metering’ lights recently installed on hundreds of slip roads.