[Tagging] Tag ref on motorway_link

Colin Smale colin.smale at xs4all.nl
Tue Oct 23 17:15:51 GMT 2012

Why make exceptions? Let's keep the rules as simple as possible (but not
simpler). Routes are always relations anyway, to allow ways to be part of
multiple routes.

Legislating that a motorway_link should never have a ref tag, is a rule
which is asking to be broken a million times. I try never to remove
(possibly correct) information from OSM. In the absence of guidance from
the wiki, what is "correct" is very subjective. I for one will never
remove an existing ref tag in order to make the slip road wiki-compliant.
If it contains the motorway ref and the wiki says it should be the
junction number then I might "correct" it. But it would be a step too far
to remove the information, which someone, somewhere may be relying on,
without it being available (and supported in tooling) via a different


> On Tue, Oct 23, 2012 at 6:07 AM, Andrew Errington
> <erringtona at gmail.com>wrote:
>> On Tue, 23 Oct 2012 14:47:40 Martin Vonwald (imagic) wrote:
>> > Hi!
>> >
>> > I'm wondering what ref should be used on slip roads/ramps of a
>> motorway
>> > (not the junction node, but the way tagged with motorway_link). Up to
>> now
>> > I've seen: * the reference of the junction
>> > * the reference of the motorway
>> > * the reference of the junction not in the ref tag but in junction:ref
>> > * nothing (neither ref nor junction:ref)
>> >
>> > In the Wiki (English and German) I couldn't find an answer.
>> >
>> > Any opinions/comments/hints are welcome.
>> I suggest 'nothing'
> I agree.  Exception: If a route follows that highway, the route's ref,
> assuming the relation for that route doesn't exist yet.  In which it's
> probably better to create the relation if you have the time.
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