With a big public celebration, the Mayor of Düsseldorf, Thomas Geisel, opened the Wehrhahn Line in the capital of North Rhine Westphalia together with State Secretary Enak Ferlemann (Member of the German Bundestag (Parliament), MdB), Federal Secretary for Construction, Michael Groschek (Member of the Landtag (regional parliament), MdL), W&F Board Member Dr.-Eng. Michael Blaschko and Head of the Area Centre, Thomas Fiedler.
The approx. 75 m long tunnel runs under the listed Kaufhof building in the heart of the city of Dusseldorf, which made it a particular civil engineering challenge. The tunnel was driven under the protection of a freezing body. With a complex monitoring concept, the engineers successfully controlled possible settlements of the Art nouveau building in the millimetre range: in fact, no settlements were recorded as a result of the construction work underground.
More than 100,000 guests celebrated the opening of the new traffic artery and made use of the free ride along the line. The new underground line will transport more than 50,000 people per day.