Now THAT is tricky.

It MIGHT be possible to do this using PoserPhysics. If not, you'd have to animate by hand, which is a total pain.
It also might be possible to write a Python script that creates the animation, sort of a dedicated physics simulation script. Complicated and tedious work, but worth your wile if you're planning on doing more railroad tracks.

By the way, that is some beautiful modeling work! I love the environment and that bridge is way cool. The train itself is wonderful too.

The pen is mightier than the sword. But if you literally want to have some impact, use a typewriter

My gallery   My freestuff