Berlin Heidelberger Platz station

Due to the boycott of the S-Bahn in West Berlin that was declared after the construction of the Wall, passenger numbers and thus also revenues fell.

S-Bahn traffic on the Ringbahn was completely stopped on the evening of 17 September and was not resumed after the strike ended.

After the Peaceful Revolution, the plans were adjusted and the section between Schöneberg and Baumschulenweg in East Berlin was included.

The S-Bahn station was moved southeast under Mecklenburgische Strasse in order to allow the construction of an entrance to the other side of the street on the one hand and direct access to the U-Bahn line below on the other.

On the northern side, the staircase now runs straight to the street so that passengers are no longer directed through the entrance building.

The impression is further enhanced by the curved position of the hall and the island platform, which is closed off at both ends by vestibules to which the exits connect.

[clarification needed] Outside the station, the tunnels also have a tunnel-vault-like profile in both directions up to a certain distance, as long as the depth below the earth's surface allows this: in a northeasterly direction under Barstrasse to around 80 m (260 ft) before the corner of Wallenbergstrasse (or around 100 m (330 ft) before crossing under the Bar bridge at Volkspark Wilmersdorf, formerly: Seepark bridge) and in a southeasterly direction under Aßmannshauser Straße to about "halfway" between the corners of Triberger and Siegburger Straße (the purpose of this U-Bahn tunnel construction method, which was very rare in Berlin at the time was the saving of many steel girders, which were required everywhere in other shaft construction).

[3] Later, the northeastern exit in the middle of Mecklenburgische Straße was demolished as part of a road widening project and relocated to the outside.

S-Bahn platform
Panoramic photo of the U-Bahn station
Platform vestibule with access from the S-Bahn station and southern entrance