[Tagging] Is it possible to have highway=unclassified with ref tag?

[Philip Barnes]

On Sun, 2018-05-06 at 09:41 +0200, Mateusz Konieczny wrote:
> I am pretty sure that it is entirely possible to have
> highway=unclassified
> with officially assigned and posted ref number, but I wanted to check
> whatever my edit on https://wiki.openstreetmap.org/wiki/Tag:highway%3
> Dunclassified
> was correct.

It is certainly possible, in the UK all public highways have a
reference number. For lower classifications these references are used
internally by Local Authorities and the references do not appear on
signs. The consensus is that only references that a visible should use
the ref tag in OSM.

For unsigned references we use official_ref and prow_ref which will not
appear on the standard map but can be rendered on more specialised
maps.

Phil (trigpoint)