Colonization of the Moon
If multiple bases were established on the lunar surface, they could be linked together by permanent railway systems. Both conventional and magnetic levitation (Maglev) systems have been proposed for the transport lines. Mag-Lev systems are particularly attractive as there is no atmosphere on the surface to slow down the train, so the vehicles could achieve velocities comparable to aircraft on the Earth. One significant difference with lunar trains, however, is that the cars would need to be individually sealed and possess their own life support systems.
Orlando maglev
A proposed US$400 million magnetic levitation train system would have connected the Orlando International Airport and the Orange County Convention Center in Orlando, Florida, with a stop at the Florida Mall. The privately funded train line would be built by American Maglev Technology and was once expected to be operational by 2017. If completed, the train would have been the first commercial maglev system in North America.