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.
Shanghai maglev train
The train set was built by a joint venture of Siemens and ThyssenKrupp from Kassel, Germany and based on years of tests and improvements of their Transrapid maglev monorail. The Shanghai Maglev track (guideway) was built by local Chinese companies who, as a result of the alluvial soil conditions of the Pudong area, had to deviate from the original track design of one supporting column every 50 metres to one column every 25 metres, to ensure that the guideway meets the stability and precision criteria. Several thousand concrete piles were driven to depths up to 70 metres to attain stability for the support column foundations. A mile-long, climate controlled facility was built alongside the line's right of way to manufacture the guideways.