A portion of the train wheels should be inside of the tracks as shown. No need for invisible walls. Ignore the drawing to the bottom right. The tracks should be outside of the wheels.
Cheers
Yea, it should work ok, but don’t know if the wheels should turn with the tracks, not sure what’s the greatest angle for a track either
The train and track would be high poly, and you would need to use polyheader bound. This would make the game run slowly, meaning somtimes the train would jump track, especaly when moving fast.