In the event of fresh snow or strong winds, so-called track plows are put in front of individual scheduled passenger trains on the Bernina line of the Rhaetian Railway. The "Allegra" ABe 8/12 # 3515 stands in Pontresina in front of train R 4621 ready for the trip over the Bernina Pass to Tirano, with the track plow Xk # 9143. In the driver's cab, in addition to the locomotive driver, there is an infrastructure employee who operates the lowering or raising of the track plow located in the middle of the vehicle via a remote control. This plow can eject snow or ice up to a few centimeters below rail level, but must be raised when driving over switches and grade crossings. The plows at the front and rear of the vehicle are fixed and not adjustable in height.