On Mon, May 14, 2012 at 11:02 AM, Martin Vonwald <imagic....@gmail.com> wrote: > Correct - this needs some simplification just like allowing > junction=roundabout on a node for small roundabouts. But I would > really like to update the page before we talk about this, because > otherwise the update won't be any time soon ;-) As it is never wrong > to map them as a loop I don't think of this as a show stopper? Do you > agree on this?
No, not a show stopper. > Now back to the problem: > * highway=turning_circle is not correct, because a turning circle > should not have an island for the same reason why a mini-roundabout > should not have one (-> large vehicles). Using traffic_calming=island > is therefore a contradiction, although I'm a little tempted to go this > way. But right now I'm resisting myself ;-) > * junction=roundabout is not correct, simply because they are no > roundabouts (one-way, right-of-way). > > The longer I think about it, the more I'm asking myself: do we really > need a tag for this? If someone doesn't want to map it as loop, why > not simply end the road without any additional tag? What information > are we missing then, that we are not missing if we use a single tag > instead of a loop? A simple answer is that people will want to tag it. :) I think most people tag highway=turning_circle not because they want to include information indicating that large vehicles can turn around, but because it makes the map prettier. Also what NE2 said about 3-point turns. Why don't we keep it simple and just use highway=turning_circle and turning_circle=island, since it's more akin to a turning_circle than a roundabout, and I doubt any data consumers other than rendering currently do anything with turning_circles. We could use highway=turning_loop also, if people have problems with using a dependent key. I suggest rendering this as a turning_circle with a dot in the middle, similar to a mini_roundabout but with a larger circle (indicating that the area is wider than the roadway with a "turning loop", which is not the case with a mini_roundabout). -Josh _______________________________________________ Tagging mailing list Tagging@openstreetmap.org http://lists.openstreetmap.org/listinfo/tagging
