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.
JŽ series 461
After dissolution of Yugoslavia, 461 class have remain in service with railways of Serbia, Montenegro and Republic of Macedonia. Today there are 46 locomotives operated by Serbian Railways. Most Serbian locomotives were passed to the cargo division in 2015, with 5 units retained for passenger trains on the Belgrade-Bar line. Railway transport of Montenegro operates 10 and Montecargo 8 locomotives of class 461, being only electric locomotive operated in Montenegro. This series is mainly used on Belgrade–Bar railway by both Serbian and Montenegrin railways. Six locomotives of 461 series are operated by Macedonian Railways, with two of them modernised and thyristorized to series 462.