The Bundesstraße 51 (translates from German Federal road, abbreviated as B 51) runs from Bremen in south-west direction though Lower Saxony, North Rhine-Westphalia, Rhineland-Palatinate and Saarland, and ends at the French border in the town Kleinblittersdorf.
Bundesstraße | Bundesstraße 4 | Bundesstraße 6 | Bundesstraße 27 | Bundesstraße 14 | Bundesstraße 10 | German ''Bundesstraße'' 437 near Stadland | Bundesstraße 8 | Bundesstraße 71 | Bundesstraße 51 | Bundesstraße 300 | Bundesstraße 299 | Bundesstraße 248 | Bundesstraße 242 | Bundesstraße 16 |
The line ran between Lennep and Burscheid parallel to federal highway 51 and from Burscheid to Opladen parallel with former federal highway 232.