West of Chilliwack is Arnold siding, most of the time while driving by there’s some action. Either in the hole or rolling.
At the east end I noticed one of the CP’s WB 152 cars coal unit trains in the hole. Lets check it out, oh what’s that? Apart from the passing siding there’s also a short spur track. Hmmm what are the these bath-tub gons doing here.
Turns out since Arnold siding is only 8360ft with a road crossing way before the end of the siding, the need to split the unit train in order to keep the crossing clear. Relinking the train - mid train and end unit - took a lot longer than I wanted to wait around for.
No pictures, video coming up.
PS the only other time I saw that done was at Spences Bridge to let the Rocky Mountaineer pass. That conductor was not impressed and related a week later what a bunch of @#$%$# are sitting in Calgary.