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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

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View onto the upgraded line Cologne-Düren (ABS 4) looking towards east from the bridge of the Aachener Straße at the eastern end of Königsdorf on 15 August 2001. The tracks for the S-Bahn (urban trains) on the right are finished and by this time used for all trains. The highspeed tracks are under construction, there is a temporary connection to the S-Bahn and a temporary connection between the tracks in the background. Digital photo by Christoph Schmitz

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View onto the upgraded line Cologne-Düren (ABS 4) looking towards east from the pedestrian bridge at the station of Königsdorf on 15 August 2001. In the center the street to Cologne (Aachener Straße) crosses the railway. The tracks for the S-Bahn (urban trains) on the right are finished and by this time used for all trains. In the area for the highspeed tracks on the left, the work on the wall is under progress. Digital photo by Christoph Schmitz

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View onto the upgraded line Cologne-Düren (ABS 4) looking towards west from the new platform of Königsdorf on 15 August 2001. The tracks for the S-Bahn (urban trains) in the center are finished and by this time used for all trains. On the right the ground was put up higher for the works on the wall, later this will be removed to build the highspeed tracks. Digital photo by Christoph Schmitz

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The end of a backbone span seen in Königsdorf (on Cologne-Aachen) on 1 February 2002. On the right, the tensioning assemblies fitted to the mast are placed behind eachother instead of side by side, as there is not much space between the tracks. On the left, where the tensioning assemblies are attached to the wall, flat weights instead of round ones are used to save space. Digital photo by Christoph Schmitz

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The end of a backbone span seen in Königsdorf (on Cologne-Aachen) on 16 February 2002. On the right, the tensioning assemblies fitted to the mast are placed behind eachother instead of side by side, as there is not much space between the tracks. On the left, where the tensioning assemblies are attached to the wall, flat weights instead of round ones are used. Compared to an older Picture (which might be above this), they were fitted with guiding rails and covers at the bottom. Digital photo by Christoph Schmitz