@Taurus717 Thanks! I did not realize that. For me it was just another freight train on this busy line. Though I saw picture of this same train from another railfan on Flickr, so yes maybe it was something special So these semi trailer shuttles normally run only through BLS line?
@rl Correct. The normal route is Freiburg-Basel-Olten-Wynigen-Ostermundigen-Thun-Frutigen-BLS-Brig-Domodossola-Orta-Novara. The second Ralpin coach is due to Anti-Covid measures.