Making my mesh compatible with splines?

I am currently creating a mesh for a basic road and pavement setup for my game.

I know that if I want to use splines to make it conform to the terrain etc, I need to create the intersection pieces separately etc.

I have two main questions :

  1. How do I make my mesh compatible with this tool?

  2. Do I also need to create separate meshes for bends? Or will splines do that bit for me?

Thanks

Anyone able to help with this?

Maybe this answer? Spline mesh - Programming & Scripting - Unreal Engine Forums

the road tool in that link looks good. thankyou!!!