Yeah, that’s one that *really* isn’t clear, and mightily useful. I had no idea this existed until I read it here 🙂
What I think could be even more useful is the option to pick S-bend inclines, so you can pick to build a road/track that goes from flat, curves up, then levels off to flat at a higher level, ready to build a bridge. The m/n road bridges are good, but if you do them over any significant distance with any significant incline, they end up becoming huge arches towering in the air. I just want a steep incline that levels off flat for the actual bridge.