Frankenbahn
Between Heilbronn Trappensee and Heilbronn Karlstor stations the ramp to the Heilbronn Stadtbahn inner city line branches off. After the Stadtbahn stop in the forecourt of Heilbronn Hauptbahnhof, the Stadtbahn runs over a level crossing of the Franconia Railway on to the Kraichgau Railway to Karlsruhe.