At first I was annoyed with the picture-in-picture, which I thought was an ad for another video, until I realized it was an on-ride cam of the real coaster you modeled this ride on, for comparison. Then I began to appreciate just how closely you'd replicated the original. Very well done there!
You do have quite a bit of z-fighting going on in the station building, however, especially in the ceiling. I suggest that you select the conflicting ceiling tiles, separate them from the building into their own building, then used advanced move to raise or lower these tiles 1-2 pixels to eliminate the z-fighting. If the resulting visible seams in the ceiling bother you, run some trim strips over them.