View onto the upgraded line Cologne-Düren (ABS 4) looking towards west from Königsdorf on 15 August 2001. The tracks for the S-Bahn (urban trains) on the left are finished and by this time used for all trains, on the right the first ballast layer for the highspeed tracks is visible. On both sides there are some interesting catenary masts attached directly to the walls.

Digital photo by Christoph Schmitz