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

[Rory McCann]

On 06/05/18 09:41, 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%3Dunclassified
> was correct.

Yes it is! AFAIR the "highway=unclassified" comes from British usage, 
where "unclassified" was a road classification. Yes it sound silly. I 
think the refs in the UK aren't signposted, but roads with the 
unclassified classification (!) have "U" refs (e.g. "U123", instead of 
"A123" etc).