Highspeed pantograph test run from Flüelen through the 57 kilometer long Gotthard Base Tunnel (GBT) to Claro, with up to 176 km/h (109,4 mph), 10 % above the regular maximum velocity of this trains. "Flirt 3" from StadlerRail for the Südostbahn (SOB) RABe 526 # 001, # 003, # 004 and # 002 in multiple traction, between Altdorf and Rynächt towards the GBT.