"Traverso" train, built by StadlerRail, RABe 526 # 220/120 of the Südostbahn (SOB), is running the "Treno Gottardo" IR 2315 of the line IR 26 from Basel via Lucerne-Gotthard mountain line-Bellinzona to Locarno, crossing the 70 meter long Kellerbach bridge (concrete, faced with stones, two bows of 33 meter) between Wassen and Göschenen, on the Gotthard north ramp.