R41 - woven-planet/opensafety-mbse GitHub Wiki
R41 / 1:1c
Lane Division marks zero or one Road Edge
Road Edge is marked by one Lane Division
On any given Road Segment, there will be two Lane Divisions that each mark a Road Edge. Since there are always two Road Edges, there must always be two such Lane Divisions in the Road Segment.
Formalization
Road Edge.(Lane division, Road segment) -> Lane Division.(ID, Road segment)