Interregio 1148 of the Rhaetian Railway from St.Moritz via the Albula line to Chur crosses the Stulsertobel Viaducts II and I between Stugl/Stuls and Filisur. Leading is the second class cab car Bt # 52805, followed by a first class unit car type IV, 2 second class cars type II, a baggage car and another unit car type II. At the end pushes the "Allegra" ABe 8/12 # 3506, which is just coming out of the 103 meter long Stulsertobeltunnel II. The interregio trains on the Albula line are usually shuttle trains of type ALVRA with a first class cab car At. But the RhB has only 6 ALVRA compositions and for the timetable they are all needed. If maintenance or repairs have to be done on a train, such a replacement composition, partly not air-conditioned, has to be used. In the future, once a so-called short turnaround of a few minutes in St.Moritz is planned, instead of a stay of 62 minutes in the current timetable. Then only 5 ALVRA compositions will be needed for the daily schedule, i.e. one will be reserve.
