MAGLEV, or magnetic levitation, is a system of transportation that suspends, guides and (usually) propels vehicles, predominantly trains, using magnetic forces. This method has the potential to be faster, quieter and smoother than wheeled mass transit systems, potentially reaching velocities comparable to turboprop aircraft.
The opposite poles of magnets attract each other and like ends repel, this is the simple principle behind electromagnetic propulsion. For a train to operate three major components must be present in the system: a powerful electrical power source, large guidance magnets attached to the underside of the train and a track lined with metal coils.
This will repel the large magnets on the underside of the carriage, causing the train to hover above the track. The key advantage of the Maglev train is that it floats on a cushion of air, with virtually no friction. This allows the train to reach such high speeds!