Hi. I built Franklin Ave industrial. The reason for the tracks running through the walls is that there is no way to reduce the size of the walls or backdrops. So because I needed a backdrop of some kind I was left with no choice. I did my best to add a transition point like the highway overpass but this wasn't possible everywhere. And if you're referring to the staging tracks behind the backdrops, that area is "out of view" from the operating floor, and again due to the limitations of the walls/backdrops I had no choice and figured it was out of view anyway so no big deal. If you have any other questions feel free to let me know.
Joe
aka Approach Medium