Do you think that routing/navigation apps are using turn restrictions tags instead of oneway tag to create the route? I dont think so...
On Tue, Nov 5, 2013 at 12:39 PM, Ilpo Järvinen <[email protected]>wrote: > On Tue, 5 Nov 2013, Balázs Barcsik wrote: > > > Think about oneway > > tag.http://wiki.openstreetmap.org/wiki/OSM_tags_for_routing > > That is a property of a way. > > So as a routing app I just would like to examine this tag, and forget the > > relations restrictions: > > http://wiki.openstreetmap.org/wiki/Relation:restriction > > Because it is a redundancy - if the oneway tag used properly the routing > app > > can determine whether you can turn right in an intersection or not. In > other > > words - if someone missed defining the road signs at intersections > > (eg, restriction=no_left_turn) then this does not mean that you can turn > > left. So I would prefer to create such tags for priority cases - which > > can be assigned to ways > > No, you are simply wrong here. Oneway is a legal concept that really > applies for the way and it is different from turning restrictions that > applies to particular combination of traversing on the graph edges (ie., > a relation). And you cannot ignore turning restrictions as it by no means > guarantees that the way itself is oneway legally, just the turning is > forbidden from the way you're coming from. > > > -- > i. > _______________________________________________ > Tagging mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/tagging > >
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