[Flair]

I think IT is a device that "floats" and how Dean Kamen did this was to have a strong electromagnet underneath the roads of the city. This way, all you have to do is turn on your magnet, and you set it up so that they have the same magnetic polls, so they push away each other. That would have to be built "into" a city. Or have a city be built around it. The only problem with this, is stopping, and steering. But you would definently be able to move pretty fast!