The Mannheim Kurpfalzbrücke–Heidelberg railway is a metre-gauge railway between central Mannheim and Heidelberg-Bergheim. It was built by the former Oberrheinischen Eisenbahn-Gesellschaft AG (Upper Rhine Railway Company, OEG), later MVV OEG AG and is now operated by MVV Verkehr GmbH (infrastructure owner) and RNV (operations manager and train operator) according to Eisenbahn-Bau- und Betriebsordnung für Schmalspurbahnen (narrow-gauge railway regulations; ESBO). The route connects the Mannheim tram network with the Heidelberg tram network. However, the line is still owned by MVV Verkehr AG (the City of Mannheim's transport utility) as the successor to the OEG. It is operated as a branch line using electronic direct traffic control.