Camera follows path

I'd like to create an fps-type game where the player (camera) is in a mine car going down a track. The player could move forward and backward, and there would be branches in the track where the player would choose which path to follow.

Basically, I'd need to have a rigidbody follow some sort of path, and be able to CHOOSE A DIRECTION at branch points--which is the problematic part. I'm not sure what the best way to do this is. I've read a lot about pathfinding on the forums, but it is all related to AI, and I don't know if it would work.

Would setting up waypoints work? Does anyone have an idea how to go about solving this problem?

 

This might help:

http://forum.unity3d.com/viewtopic.php?t=5898&highlight=camera+path+follow

 

I've checked that out, the copter demo is sweet! My problem is that I don't know how script/construct my scene to allow the user to choose a direction at the branch point of a path. That project has a path with no branch points.


Edit: I can't seem to get the car demo to play--does this one allow you to choose directions on the path?

 

What it you made a hierarchical path mesh?

Code (csharp):

1.     /aa
2. a-- -- ab
3.     \ac
4.  

You could recursively activate only branches that are relevant. I see a couple of methods discussed on the forum for object path following.