How do maglev trains float above the tracks?

The answer

Magnetic levitation (maglev) trains use powerful electromagnets to lift the train 10–15 millimeters above a guideway, eliminating friction between wheels and rails. Two main technologies exist: electromagnetic suspension (EMS), used in Germany's Transrapid and China's Shanghai maglev, attracts the train upward; electrodynamic suspension (EDS), used in Japan's SCMaglev, uses superconducting magnets that repel the guideway. Japan's L0 Series set the world record at 603 km/h in 2015. Without mechanical contact, maglev systems are quieter, require less maintenance, and can achieve speeds rivaling aircraft.