Re: [Tagging] Highway=*_link roads at Y-junctions and roundabouts?
Thank you for the clarification. (Tagging the Y-junctions and traffic circle entrances results in a small rendering issue with the current Openstreetmap-carto style, but if is a tagging mistake we don’t need to change anything.) On Wed, Dec 19, 2018 at 7:52 AM Michael Booth wrote: > Agreed, a short Y section before a roundabout because there is a small > bit of painted or physical separation doesn't mean they are _link roads > - it's still the same through road. > > The wiki says "The _link tags are used to identify ... 'channelised' > (physically separated) at-grade turning lanes connecting the through > carriageways ... to other roadways" > > So this way is correctly tagged as a _link road: > https://www.openstreetmap.org/way/352297911 / > https://www.mapillary.com/map/im/5jD0ksQCmHPt11DizKyztA - but the other > ways connecting to the roundabout aren't, because they are through > carriageways (you could argue the roundabout is the thing doing the > linking here). > > On 16/12/2018 15:51, Greg Troxel wrote: > > Joseph Eisenberg writes: > > > >> While checking the rendering of highway link roads (eg motorway_link, > >> primary_link, tertiary_link), I noticed that in some cases these tags > >> are used when a road splits in a Y-junction, for example before a > >> traffic circle / roundabout. In some areas these are the most common > >> forms of _link for less major roads, eg secondary_link and > >> tertiary_link. > >> > >> On the wiki there was some debate about whether it was correct to tag > >> a Y-junction as leading into link roads, or if these should only be > >> used for slip lanes and on-ramps which merge off of or onto the > >> through-lanes of another road: > >> https://wiki.openstreetmap.org/wiki/Talk:Highway_link > > It seems that the Y roads should not be link. link is about a > > connecting road used when changing roads, and the last few feet entering > > a rotary, especially when there is no other choice, does not fit that. > > > > In particular, if a road wouldn't be tagged differently at a rotary, but > > happens to be divided (dual carriageway) the last 50m, then it's fine to > > make two ways, but not to change the way type. > > > > ___ > > Tagging mailing list > > Tagging@openstreetmap.org > > https://lists.openstreetmap.org/listinfo/tagging > > > > ___ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging > ___ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
Re: [Tagging] Highway=*_link roads at Y-junctions and roundabouts?
Agreed, a short Y section before a roundabout because there is a small bit of painted or physical separation doesn't mean they are _link roads - it's still the same through road. The wiki says "The _link tags are used to identify ... 'channelised' (physically separated) at-grade turning lanes connecting the through carriageways ... to other roadways" So this way is correctly tagged as a _link road: https://www.openstreetmap.org/way/352297911 / https://www.mapillary.com/map/im/5jD0ksQCmHPt11DizKyztA - but the other ways connecting to the roundabout aren't, because they are through carriageways (you could argue the roundabout is the thing doing the linking here). On 16/12/2018 15:51, Greg Troxel wrote: Joseph Eisenberg writes: While checking the rendering of highway link roads (eg motorway_link, primary_link, tertiary_link), I noticed that in some cases these tags are used when a road splits in a Y-junction, for example before a traffic circle / roundabout. In some areas these are the most common forms of _link for less major roads, eg secondary_link and tertiary_link. On the wiki there was some debate about whether it was correct to tag a Y-junction as leading into link roads, or if these should only be used for slip lanes and on-ramps which merge off of or onto the through-lanes of another road: https://wiki.openstreetmap.org/wiki/Talk:Highway_link It seems that the Y roads should not be link. link is about a connecting road used when changing roads, and the last few feet entering a rotary, especially when there is no other choice, does not fit that. In particular, if a road wouldn't be tagged differently at a rotary, but happens to be divided (dual carriageway) the last 50m, then it's fine to make two ways, but not to change the way type. ___ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging ___ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
Re: [Tagging] Highway=*_link roads at Y-junctions and roundabouts?
On Sun, 16 Dec 2018 at 01:24, Joseph Eisenberg wrote: > > While checking the rendering of highway link roads (eg motorway_link, > primary_link, tertiary_link), I noticed that in some cases these tags > are used when a road splits in a Y-junction, for example before a > traffic circle / roundabout. In some areas these are the most common > forms of _link for less major roads, eg secondary_link and > tertiary_link. I'd say that a road is only a highway link if it doesn't belong to one or the other road. For example, this roundabout entrance https://www.openstreetmap.org/way/631552692 clearly belongs to the secondary road 144, whereas this road section https://www.openstreetmap.org/way/201572456 which bypasses the roundabout, belongs neither to the secondary road 144 nor the primary road 9. And regarding this short road section at an intersection https://www.openstreetmap.org/way/421827471 it's also clear that it geometrically belongs to Avenue de Blonay instead of Rue des Chenevières. > Examples of tertiary_link used at a roundabout (rendered thinner in > these examples) > https://user-images.githubusercontent.com/42757252/5948-8e4c7c80-ffde-11e8-8718-3446aefe7ab6.png As in my examples above, i'd tag the bypass in the southwest _link, but not the entrances and exits of the roundabout. > https://user-images.githubusercontent.com/42757252/5961-9a383e80-ffde-11e8-8d7a-cd85f4dbf125.png Again, i wouldn't tag the roundabout entrances and exits _link. Those are just short road sections that are dual carriageway. > Here are some debatable places where a tertiary_link might be tagged > at a Y-junction: > https://www.openstreetmap.org/node/412162671 Seems fine to me without _link. > https://www.openstreetmap.org/node/2539835932 There's just a triangular painted island, that means it's just one carriageway. Therefore i'd rather not map two one-way road sections there (see https://wiki.openstreetmap.org/wiki/Highways#Carriageways). Regards Markus ___ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
Re: [Tagging] Highway=*_link roads at Y-junctions and roundabouts?
Joseph Eisenberg writes: > While checking the rendering of highway link roads (eg motorway_link, > primary_link, tertiary_link), I noticed that in some cases these tags > are used when a road splits in a Y-junction, for example before a > traffic circle / roundabout. In some areas these are the most common > forms of _link for less major roads, eg secondary_link and > tertiary_link. > > On the wiki there was some debate about whether it was correct to tag > a Y-junction as leading into link roads, or if these should only be > used for slip lanes and on-ramps which merge off of or onto the > through-lanes of another road: > https://wiki.openstreetmap.org/wiki/Talk:Highway_link It seems that the Y roads should not be link. link is about a connecting road used when changing roads, and the last few feet entering a rotary, especially when there is no other choice, does not fit that. In particular, if a road wouldn't be tagged differently at a rotary, but happens to be divided (dual carriageway) the last 50m, then it's fine to make two ways, but not to change the way type. ___ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
[Tagging] Highway=*_link roads at Y-junctions and roundabouts?
While checking the rendering of highway link roads (eg motorway_link, primary_link, tertiary_link), I noticed that in some cases these tags are used when a road splits in a Y-junction, for example before a traffic circle / roundabout. In some areas these are the most common forms of _link for less major roads, eg secondary_link and tertiary_link. On the wiki there was some debate about whether it was correct to tag a Y-junction as leading into link roads, or if these should only be used for slip lanes and on-ramps which merge off of or onto the through-lanes of another road: https://wiki.openstreetmap.org/wiki/Talk:Highway_link Also see https://wiki.openstreetmap.org/wiki/Highway_link which is marked with a banner that "This article or section contains questioned, contended or controversial information." Examples of tertiary_link used at a roundabout (rendered thinner in these examples) https://user-images.githubusercontent.com/42757252/5948-8e4c7c80-ffde-11e8-8718-3446aefe7ab6.png https://user-images.githubusercontent.com/42757252/5961-9a383e80-ffde-11e8-8d7a-cd85f4dbf125.png Here are some debatable places where a tertiary_link might be tagged at a Y-junction: https://www.openstreetmap.org/node/412162671 https://www.openstreetmap.org/node/2539835932 -Joseph ___ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
