A pair of AVG's GT8-100D/2S-M works its way uphill into the Black Forest mountains near Forbach, south of Karlsruhe, on the S31 route to Freudenstadt.
A Hamburg S Bahn train leaves Hamburg Hauptbahnhof on route S31 to Harburg-Rathaus. A soon to be replaced class 218 diesel-hydraulic waits in the background.