TRAVERSO RABe 526 # 103/203 of the Südostbahn (SOB) is running the Interregio 2422 "Treno Gottardo" from Bellinzona over the Gotthard mountain line to Zürich, leaving the 230 meter long Rohrbach tunnel between Wassen and Gurtnellen. Since change of timetable in december 2020, the Südostbahn is running the hourly service over the Gotthard mountain line in co-operation with the SBB, before it was TILO.