Hi all, Someone on the help site is questioning about a missing u-turn restriction on a roundabout junction with splitter islands ([1] in French). The problem is when you take one roundabout exit and want to come back to the roundabout, a router like OSRM is telling you to immediatly turn left after the divider although it is not allowed on the ground. He is pointing one example on OSRM : http://map.project-osrm.org/?hl=fr&loc=47.291040,-2.356550&loc=47.291970,-2.356720&z=18¢er=47.291347,-2.357208&df=0
With the aearial imagery (can be enabled on OSRM), we can see that the u-turn is forbiden on about 10..15 meters after the splitter island with a painted continuous line on the ground. I don't think a no-turn-left-restriction relation is the best solution here since we just indicate the restriction at the splitter island node but we don't say at which point it will be possible to u-turn. I think the best solution is to represent the continuous painted line on the 15 meters road segment. The best tag I've found so far is the "divider" proposal on the wiki ([2]) but is not very popular ([3]). Any thought ? Pieren [1] http://help.openstreetmap.org/questions/13939/interdiction-de-tourner-sur-entreesortie-de-rond-point [2] http://wiki.openstreetmap.org/wiki/Proposed_features/Divided_road [3] http://taginfo.openstreetmap.org/keys/divider _______________________________________________ Tagging mailing list Tagging@openstreetmap.org http://lists.openstreetmap.org/listinfo/tagging
