This image is from the Old Bug Report. The bug is still present in 0.1.9.0
So this thing isn’t part of the monorail. It actually belongs to the bowling alley. It has no collisions and is only textured on the outside (it’s kind of like a ring), and it holds the players who are bowling (which is why one would think it is part of the bowling alley). It seems like something that’s meant to be hidden in the ground, and this is possibly a placeholder position and model, but I don’t know.
I only brought this back up because the old topic was closed, and it wasn’t really resolved.