The "Schalke" diesellocomotive Gmf 234 # 02 "Engadin" is crossing the Brusio spiral viaduct in a grade of 7.0 %,, pulling the new rail corridor dyagnosis car P # 10175 of the ARGE (syndicate) Sersa/INovitas/Kistler (former ciment silo car "Mohrenkopf" Uc # 8098, built by Josef Meyer/Rheinfelden and MBA/Dübendorf in 1964, sold to Sersa in 2014). The car is used on the entire RhB network this week and all lines are recorded with high-resolution, georeferenced 3D video (infra3DRail of INovitas).