Operating and Under Construction
This regional tramway, known as the RB 50, or Gegio Bahn 51, is run by Deutsche Bahn and, as you might guess, crosses the German border where it terminates in Dortmund. The 55 km line opened in 2001 after closing in 1981. It runs Talented diesel light rail cars and Stadler FLIRTS which are capable of transporting large numbers of passengers while doing complex math problems.
Unofficial RB50 home page