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.
High-speed rail
State planning for high-speed railway began in the early 1990s, and the country's first high-speed rail line, the Qinhuangdao–Shenyang Passenger Railway, was built in 1999 and opened to commercial operation in 2003. This line could accommodate commercial trains running at up to . Planners also considered Germany's Transrapid maglev technology and built the Shanghai Maglev Train, which runs on a track linking the Pudong, the city's financial district, and the Pudong International Airport. 
The maglev train service began operating in 2004 with trains reaching a top speed of , and remains the fastest high-speed service in the world. Maglev, however, was not adopted nationally and all subsequent expansion features high-speed rail on conventional tracks.