The Rhine-Neckar Metropolitan Region, often referred to as Rhein-Neckar-Triangle, is a polycentric metropolitan region located in south western Germany, between the Frankfurt/Rhine-Main region to the North and the Stuttgart Region to the South-East.
The Rhine-Neckar S-Bahn (S-Bahn RheinNeckar) forms the backbone of the urban rail transport network of the Rhine Neckar Area, including the cities of Mannheim, Heidelberg and Ludwigshafen.
Line S1 S-Bahn train in the former Mannheim Rangierbahnhof station