I don't know if there are too much triangles in this asset. (The train stop) I try to reduce and simplify the mesh but it's hard. What are you thinking about ?
I might be over-optimizing here, but you could probably go as low as this (depending on how close you will see it)...I admit it is not much more than a blockout, but it could be enough with good normals...proportions are a bit off... Try something in between...I mean...that train stop has about 4 times as many tris as the…