Maglev
(derived from magnetic levitation) is a method of transportation that uses magnetic levitation to carry vehicles with magnets rather than with wheels, axles and bearings. With maglev, a vehicle is levitated a short distance away from a guide way using magnets to create both lift and propulsion.
The Magnetic Cushion
The system’s guideway is the lifeblood of the maglev. Without it the train would be at a standstill, similar to a conventional train without its tracks. It maintains a cushion of air that levitates the maglev between 0.39 and 3.93 inches above the guideway. Because of this the guideway eliminates friction, allowing it to reach speeds of 310 mph or more.