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.
Lviv
Historically, the first horse-drawn tramway lines in Lviv were inaugurated on 5 May 1880. An electric tram was introduced on 31 May 1894. The last horse-drawn line was transferred to electric traction in 1908. In 1922 the tramways were switched to driving on the right-hand side. After the annexation of the city by the Soviet Union, several lines were closed but most of the infrastructure was preserved. The tracks are narrow-gauge, unusual for the Soviet Union, but explained by the fact that the system was built while the city was part of the Austro-Hungarian Empire and needed to run in narrow medieval streets in the centre of town. The Lviv tramway system now runs about 220 cars on of track. Many tracks were reconstructed around 2006. The price in February 2011 of a tram/trolleybus ticket was 1.50 UAH (reduced fare ticket was 0.60 UAH, e.g. for students). The ticket may be purchased from the driver.