Maglevs
A maglev, short for MAGnetic LEVitation, is a type of train that uses magnets to hover above the track. This removes the friction from wheels on rails that limits the speed of ordinary trains. Maglev trains can therefore travel faster, as well as more smoothly and quietly, than wheeled trains. They have been tested at speeds of up to 603 km/h (374 mph). Maglevs also use much less fuels.
A maglev train works because “like” magnetic poles push each other apart and "opposite" magnetic poles are attracted to each other. Powerful magnets fixed to the track push and pull magnets fixed to the train in such a way that the train continually moves forwards.