Overview
- The fault at the Blankenburg signal box that began Thursday curtailed normal operations on lines S2, S26 and S8.
- On Friday morning, S2 ran every 10 minutes between Lichtenrade and Gesundbrunnen and only every 20 minutes toward Buch.
- Line S26 operated solely between Teltow Stadt and Nordbahnhof as the North–South corridor remained partially interrupted.
- A police operation over unauthorized persons near Altglienicke produced additional delays and cancellations on S46, S8, S85 and S9.
- Medical assistance at Hauptbahnhof caused further knock‑on delays on S3, S5, S7, S75 and S9, and the operator gave no estimate for repairs.