Due to construction work in the Hauenstein Base Tunnel with partial single-track operation for five weeks, various trains are canceled and others are rerouted via the old, single-track Hauenstein line from Olten via Läufelfingen to Sissach. The S9 service on this line is cancelled and replaced by an half hourly bus service. Every half an hour the IC trains from Brig or Interlaken via Bern to Basel are rerouted over this old Hauenstein line. IC 1060 of the line IC6 from Brig to Basel with "Astoro" highspeed tilting trains ETR 610 # 014 and RABe 503 # 017 of the SBB in multiple control is crossing the 25 meter high and 128 meter long Rümlinger viaduct, which is bridging the Häfelfinger valley and was built from 1856 to 1858 by the Schweizerische Centralbahn (SCB)/Swiss central railway.
