3D line styles are a powerfull tool, but if the ifc can't export it, they don`t mean much in a BIM world. Possibility to export them (barriers, Posts, Signs, ...) is a major breakthrough for OpenRoads/OpenSite BIM capabilities.

The same goes for meshes and other 3D solids. The software now only export meshes with feature definition applied to them. I just wnat to place a cube solid and see it exported.