Self-powering roads
Sir: I was delighted to read about the possibilities of generating electricity by walking along pavements ("Man Power", 26 October). I have long dreamed of harnessing the pressure of vehicle tyres on roads in a similar fashion. I can see the day when impatient drivers on the M25 can at least be consoled in the knowledge that the electronic sign over their heads warning of severe congestion ahead has been powered by that very congestion.
ROBERT HUNT
WINCHESTER, HAMPSHIRE
Call me a romantic, but I think that's beautiful.
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