| The Ortenau S-Bahn (OSB) is a regional railway operator in the German state of Baden-Württemberg. It is a subsidiary of the Südwestdeutsche Verkehrs-Aktiengesellschaft (SWEG), a transport company owned by the state of Baden-Württemberg. This class RS1 diesel shuttle were developed by Adtrans and later sold to Stadler Rail (Switzerland), which produce them in their factory near Berlin. |