1976. Parts of two of the lines, designated U4 and U6, date back to the Stadtbahn ("city railway") system, which opened in 1898. Parts of the U2 and U6...

The Vienna Stadtbahn (German: Wiener Stadtbahn) was a rail-based public transportation system operated under this name from 1898 until 1989. Today, the...

the area-wide Erfurt Stadtbahn (light rail) network, established as a tram system in 1883, upgraded to a light rail (Stadtbahn) system in 1997, and continually...