Not only...
...are bridges and switches built on a tilt, I think they made them that way so we couldn't model them. Let nature take its course. Form follows function. I think it's called super-elevation. Easing- Easy does it. Err, uhhmmmm, "don't tip the train, less you wanna spill the load"???!!! Even Thomas has bridges and switches that are not level.
I miss Ringo Starr and Shining Time Staion.
Mark