Badische Hauptbahn
In the northern section between Mannheim and Karlsruhe there are two different lines, the Mannheim–Graben-Neudorf–Karlsruhe line (the Baden Mainline as such) as well as the Mannheim–Heidelberg–Bruchsal–Durlach–Karlsruhe line (the Baden-Kurpfalz Railway). Particularly after World War I it became a major line for international traffic. Beginning in the 1950s,the Rhine Valley line was progressively electrified, with the line fully electrified by the middle of 1958.