Concerns Luzern-Interlaken Express railway (operated by zentralbahn):
From Mon, 17 Oct through Sun 27 Nov, the line between Meiringen and Interlaken Ost will be completely closed due to construction works. There are replacement buses operating along the line; please allow a longer travel time.
See the online timetable www.sbb.ch/en
Trains are operating normally on the stretch Lucerne-Meiringen during that period.
Also, trains Interlaken Ost - Zweisimmen // Montreux are running as scheduled.