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<joseph.eisenb...@gmail.com> 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.
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