trains on curved tracks?

[UltraProAnti]

There are plenty of trains in HL2 but they all run on straight tracks. Is there a way of making them run on curved tracks? Perhaps using physics, with a motor and some functional wheels?

 

[RabidJester]

In the train func settings, I think, there's a setting to interpolate the path between points or something. But I haven't had my coffee yet.

So I'm saying I could be wrong. But it might be in there.