Magnets on board and in the track lift the train between eight and 12 millimeters, depending on how much electrical current is used. What keeps maglev vehicles from gaining widespread use is the need to set up an infrastructure of electromagnetic rails and roads. In their video, Volkswagen designers envision a scenario where magnetic iron rock or ore [underground] help create the car's levitation; alternatively, the minerals could be mined and mixed in with the tarmac. Using a small model of the car, VW created a video of Jia's parents "driving" the hovercraft around their hometown, Chengdu. Though such a creation would not be available for years — or, possibly, ever — it's always nice to dream, and brings us one step closer to flying cars.