OK, I see. Do they usually have inspection pits on this RIP track? Or do they just crawl underneath.
I've seen this before once on a documentary on the station of Cook on the Nullarbor in Australia. Sometimes they need to do an emergency repair on a car on the main line, under time pressure as delaying one train delays them all as they can hardly pass each other.
Of course, you are not modeling the Nullarbor

, but I understand the idea. It can be a great timesaver if the cars are loaded. Good idea to model this.
David.