New alignment and need for stations and offsets

@stefan.markic @Benzcly
In the US, road infrastructure is based on stations and offsets relative to the alignment. How is that now handled in the changes made in RC2?

If you mean how to specify such geometry, I’d suggest using IfcSectionedSurface or IfcSectionedSolidHorizontal. Note, though, that these are still in the finalization stage.

If you mean positioning elements along the alignment, I’d use IfcLinearPlacement.