The Munich–Treuchtlingen railway, also known as the Altmühlbahn, is a railway line in the German state of Bavaria. As part of the new and upgraded Nuremberg–Ingolstadt–Munich line project, the Munich-Ingolstadt section is gradually being upgraded for a line speed of up to 200 km/h (120 mph).

The Treuchtlingen–Nuremberg railway is a 62 km long main line in the German state of Bavaria. Most of it follows two parts the historic Ludwig South-North Railway, one of the oldest lines in Germany. Today, even after the opening of the Nuremberg–Ingolstadt high-speed railway, it is still used for long-distance services. It is also used as a detour during closures of the high speed line for maintenance. Between Nuremberg and Roth S-Bahn services run on the parallel Nuremberg–Roth line.