On Sun, 2012-08-19 at 11:44 +0200, Fabrizio Carrai wrote: > After a short discussion on the italian talk, I would move the > discussion in this list. After some tests with OSRM, I missed the > availability of a tag to mark the continuos (or discontinued) line > that divide the lanes in several single carriageway. > > > In my opinion this is an important indication to the routers to avoid > illegal turns across a road. A typical useful application case is a > road with many side road [2]. Actually the problem is solved with > several turn restriction relations, one for each side way. Tagging the > main way with "divider=solid_line" the problem would have been solved > in a easier way, also reflecting the real status of the road. > > > Indeed a "Divider=solid_line" proposal [3] was already presented . I'm > would revamp such proposal. > What is your opinion ? Is there any router developer here ? > How would you tag the direction of the solid line? An example here http://goo.gl/maps/9o06r.
Traffic approaching the bend is not allowed to cross the line, traffic leaving the bend is. Through the bend there are double white lines, indicating neither direction may cross. I have never seen a turn restriction, enforced by a solid line however. There will always be a turn restriction sign. It is far simpler to just use the turn restriction where needed, there are very few of them. Whereas nearly every corner will need Divider=solid_line:Forward Divider=solid_line:Forward:Reverse Divider=solid_line:Reverse that will rapidly become tedious for mappers. Phil _______________________________________________ Tagging mailing list [email protected] http://lists.openstreetmap.org/listinfo/tagging
