The term "Maglev" (Magnetic Levitation) refers to a technology, and its top speed depends on whether you are talking about commercial service or experimental records. The Shanghai Maglev in China, currently the fastest commercial train in the world, operates at a top speed of 431 km/h (268 mph) during its daily runs. However, the world record for Maglev technology is held by Japan's L0 Series SCMaglev, which reached a staggering 603 km/h (375 mph) during a test run in 2015. These trains achieve such incredible speeds because they "float" on a cushion of air created by powerful magnets, eliminating all rolling friction from wheels and tracks. The only major resistance they face is aerodynamic drag. Future "Hyperloop" concepts aim to put Maglev trains inside vacuum tubes to eliminate air resistance as well, theoretically allowing for speeds exceeding 1,000 km/h (620 mph).