What if you had a solar powered system that heated ones driveway in the winter and melted the snow effectively, on a timer. No need for snowplows and eco friendly. Big market. You could even have a large series of hoses containing a fluid that could be heated using the solar energy, and heat the driveway but would also be tough to stand up to cars constantly driving over it. Otherwise the system would have to be embedded in the driveway during its construction..