There are lots of cases where routing software uses turn restrictions, it would be next to useless if it relied on oneways alone.
Phil (trigpoint) -- Sent from my Nokia N9 On 05/11/2013 13:09 Balázs Barcsik wrote: 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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