Sweep1 with Parallel Sections

I probably should not have mentioned the mysterious “Roadlike”, too much of a distraction. I won’t mention it again in this thread.

[quote=“pascal, post:3, topic:33855”]
I think you can get what you want by -

ExtrudeCrv the path level with the Top plane.
Sweep1 along the edge of the surface using the ‘Align with surface’ style in sweep 1:
[/quote]That gives me what I want. Not at all obvious. Thanks. Much appreciated.

An option for the section/shape curve direction in Sweep1 and also in Sweep2 to use simple blending/interpolation of the section/shape based on the input section/shape curve direction only and not the shape of the rail(s) would be very useful. It is not at all obvious why in a simple sweep the shape/section curve wiggles around between the input shape/section curves.