The underground station "Heumarkt" in the city centre of Cologne seen on 15 December 2013, the first day of regular operation. Here, the new underground line through the city (Nord-Süd-Stadtbahn, running from north to south) passes under the tracks crossing the city from east to west (Ost-West-Stadtbahn, currently served by lines 1, 7 and 9). This is the lower level which houses the Nord-Süd-Stadtbahn. Only the northern section of it from here to the main station is in service by now, so only the western track (shown here) is used. A train of line 5, leaded by car 2107, has arrived short before. Later it will depart towards the other terminal stop, "Am Butzweilerhof", the destination indicator was already changed.

Digital photo by Christoph Schmitz (christoph.schmitz2@post.rwth-aachen.de)