[Tagging] Highway=*_link roads at Y-junctions and roundabouts?

Joseph Eisenberg joseph.eisenberg at gmail.com
Sun Dec 16 00:23:04 UTC 2018

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

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:

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)

Here are some debatable places where a tertiary_link might be tagged
at a Y-junction:


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