Berlin Hauptbahnhof
The so-called "mushroom concept" ("Pilzkonzept"), which was adopted for the planning and construction of lines connecting to the new Berlin Hauptbahnhof, included the restoration of the Anhalt Railway in the Berlin area. The north–south main line would connect Berlin Hauptbahnhof to the Anhalt Railway. This involved upgrading the Berlin–Leipzig railway for high-speed operations at up to 200 km/h in 2005 and 2006. A total of €1.657 billion was invested in the upgrade of the lines between Halle, Leipzig and Berlin up to the end of 2013. The investment of €9 million is still awaited.