There's a French company that got a government contract to pave 1000 km of road with PV. Wattway by Colas | Paving the way to tomorrow’s energy This is a serious company with decades of experience in road building. This seems like a much more serious project and technology than the US couple who raised a lot on indiegogo for solar roads. It's glued directly to existing good paving and painted with some sort of transparent coating. They seem to be trying to use it in the same difficult case of roads. I'd think there would be an enormous market with just gently used paving like paved shoulders, service drives, outer parking lots or driveways in warm sunny climates. I suspect just those areas would be many times the current total installed solar PV. Comments?