Speed bumps that generate electricity as cars drive over them are to be introduced in the UK as part of a pilot in London. The bumps are comprised of a series of panels set in a pad on the road. As cars drive over them, the panels are depressed and then released moving a cog under the road. The cog turns a motor which produces mechanical energy. It is estimated that a steady stream of traffic driving over a bump can generate 10-36kW of power. It is believed that with a steady traffic flow, four of the bumps would power all the street lights, traffic lights and road signs for a mile-long stretch of street. (Image Wikipedia)
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