Roads sides

Roads sides are auxiliary geometries that can be lofted along the path of the road, on its left or right side:

There can be up to 6 different roads sides meshes on each side of the road. In the example above three geometries are used to define the sides of that example road: one guardrail geometry, one concrete side block geometry and one noise barrier geometry. Each geometry should have startup / ending pieces to ensure a proper connectivity when reaching the limit of the presence of that geometry.

Each side geometry can be turned on or off on a per road point basis. A side geometry will only appear if it's in between two points for which it's enabled.