S 21 – City S-Bahn
S-Bahn line in the centre of the city
Three tunnels, 12 bridges, 14 retaining structures, 16 noise protection walls, three transport stations, five platforms
Second north–south axis
The S 21 forms a second north–south line of the Berlin S-Bahn in the city centre. The new S-Bahn line will connect “Wedding” with “Südkreuz” via the central station and thus link the central station to the S-Bahn ring. SSF Ingenieure has been commissioned for the third construction phase, a 2.1 km long, two-track tunnel-bridge section between the “Potsdamer Platz” and “Yorckstraße” and “Yorckstraße/Großgörschenstraße” S-Bahn stations.
Planning period
2020–2024
Service areas
General planning, including surveying, subsoil consulting, and expert opinions for planning approval, object planning and structural engineering of a tunnel, 12 bridges, 14 retaining structures, numerous noise protection walls, three traffic stations, and a direct current sub-station
Yann de Romemont, Project Engineer for Object Planning in Berlin
Planned route of the S 21
Route of the S 21
After leaving the “Potsdamer Platz” underground station, the line runs through the city centre via “Gleisdreieck” until it rejoins the existing line at “Yorckstraße” where it branches off into two sections. In the Gleisdreieck area, a new railway station with a traffic stop and connection to the underground will be built, and the Yorckstraße and Yorckstraße/Großgörschenstraße railway stations will be expanded and renovated.
- After leaving the “Potsdamer Platz” underground station, the line runs through the city centre via “Gleisdreieck” until it rejoins the existing line at “Yorckstraße” where it branches off into two sections.
- In the Gleisdreieck area, a new railway station with a traffic stop and connection to the underground will be built, and the Yorckstraße and Yorckstraße/Großgörschenstraße railway stations will be expanded and renovated.