The project "Closing the U5 gap" extends the U5 line from Alexanderplatz to Brandenburger Tor where it joins the U55, known as the "Chancellor underground". This particular section of line consists of 2.2 kilometres of tunnels, with three new stations being constructed in the centre of Berlin. The topping-out ceremony was held down on the future track bed, giving visitors a special opportunity to take a look at the city's underground.
To the project