Previous discussion: https://lists.openstreetmap.org/pipermail/tagging/2014-June/017805.html <https://lists.openstreetmap.org/pipermail/tagging/2014-June/017805.html>
Some people suggested `junction=traffic_circle` It’s used in taginfo a few times but pretty unofficial and rare. Bryan > On Nov 7, 2016, at 9:30 AM, Daniel Hofmann <[email protected]> wrote: > > Over at OSRM we're not only doing Routing on OSM but also Guidance for users > once a suitable route is found. In order to make the user experience great > and the instructions pleasant to use we differentiate between > > 1/ Roundabouts > Think: "at the roundabout take the nth exit" > > 2/ Roundabout Intersections > These are roundabouts with up to four ways and turn angles which makes the > turns obvious. > Think: "at the roundabout turn left" > > 3/ Rotaries > These are large and named roundabouts. > Think: "at Meinplatz take the nth exit" > > 4/ Not-a-Roundabout (what this post is about) > There are situations where one of the entering road has right of way, which > disqualifies the scenario for being classified as a roundabout. The Wiki has > a section on these Not-a-Roundabouts: > > http://wiki.openstreetmap.org/wiki/Tag:junction%3Droundabout#Not_a_roundabout > <http://wiki.openstreetmap.org/wiki/Tag:junction%3Droundabout#Not_a_roundabout> > > In all these cases, the key “junction” is not necessary at all. You need no > > special tagging. > > Most of these Not-a-Roundabouts have a note on them, telling users not to tag > them as junction=roundabout as this is a common mistake. Here are two > examples in Berlin: > > Bersarinplatz > > http://www.openstreetmap.org/way/288767318#map=19/52.51849/13.45355&layers=D > <http://www.openstreetmap.org/way/288767318#map=19/52.51849/13.45355&layers=D> > > http://www.openstreetmap.org/directions?engine=osrm_car&route=52.51786%2C13.45348%3B52.51918%2C13.45281#map=19/52.51852/13.45327 > > <http://www.openstreetmap.org/directions?engine=osrm_car&route=52.51786%2C13.45348%3B52.51918%2C13.45281#map=19/52.51852/13.45327> > > Kottbusser Tor > > http://www.openstreetmap.org/way/159155852#map=19/52.49898/13.41881&layers=D > <http://www.openstreetmap.org/way/159155852#map=19/52.49898/13.41881&layers=D> > > http://www.openstreetmap.org/directions?engine=osrm_car&route=52.49915%2C13.41952%3B52.49857%2C13.41852#map=19/52.49896/13.41865 > > <http://www.openstreetmap.org/directions?engine=osrm_car&route=52.49915%2C13.41952%3B52.49857%2C13.41852#map=19/52.49896/13.41865> > > As you can tell, for both of those situations the routing engine is not able > to issue special instructions since there is no tag to parse. And parsing > note tags for the occurrence of roundabout is not a solution ;) > > With the current situations of having note="don't tag as roundabout" > pseudo-tags on most of those it would make sense to establish a proper > junction=not_a_roundabout tag (tag is up for discussion) software can parse > and make use of. > > What's your opinion on Not-a-Roundabout? > > Cheers, > Daniel J H > _______________________________________________ > Tagging mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/tagging
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