The world's cheapest car, Tata Nano, has won gold prize in the best new product segment under the transportation category at the 2010 Edison Awards.Recognised as America's innovation award, the Edison Awards symbolise the persistence and excellence personified by Thomas Alva Edison, a Tata Motors statement said.The companies are judged on marketplace innovation, marketplace success, technological innovation, market structure innovation, societal impact and design innovation, it said.(Source DD)