The Maglev train system is a 20th century invention. It is a new type of non-track bound transport system which is high speed, comfortable, energy saving and environmentally friendly. It has no wheels, transmissions or overhead wires. The wheels and rails of the railroad are replaced by a non-contact, electro-magnetic levitation, guidance and propulsion system. The Construction of the Shanghai Maglev Demonstration Operation Line started in March 2001.