Overview

• Service on S1 is suspended between Frohnau and Birkenwerder until about 1:30 a.m. Monday, with replacement buses operating.
• Trains continue every 10 minutes between Wannsee and Frohnau on S1, and every 20 minutes between Birkenwerder and Oranienburg.
• Buses are running on S8 between Mühlenbeck‑Mönchmühle and Birkenwerder to cover the affected section.
• S85 turns back at Waidmannslust instead of Frohnau to help preserve the S1 10‑minute frequency on its core segment.
• The Hohen Neuendorf electronic interlocking entered service in spring 2024 and was largely stable until summer, with recurring problems reported since early September.