ConstReadonlynormal: 3Normal.
Readonlyposition: 3Position relative to the settlement centre.
Readonlyroad: 4Half carriageway width, class 0..2, surface 0..3, part.
Readonlyuv: 2Metres across from the centreline (or up a vertical face), metres along the road.
Vertex attributes of road geometry.
road= (half carriageway width, class, surface, part).