In Japan,from the middle of the twentieth century, the engineers are working on
the maglev train concept. In 1968, James Powell, a researcher at
Brookhaven National Lab, thought of using maglev trains (derived from
magnetic levitation). The old wheel and axle model has been replaced by
levitation system in maglev which lifts the cars by magnetism.The lift and push are provided to the train by the repulsive and attractive forces of magnetism used by this system.