Hi folks,
this is just a suggestion for something that might be a useful tidy-up job for an automated script…
In Northern Ireland, public roads are ‘adopted’ by Stormont’s DfI Roads Service (DfI Roads | nidirect) and given reference numbers of M, A, B, C or U.
On OSM, tagging for M, A and B class roads in Northern Ireland seems pretty consistent, complete and error free:
- M:
highway=motorway,ref=Mnn - A (green signs):
highway=trunk,reg=Ann - A (black-on-white signs):
highway=primary,ref=Ann - B:
highway=secondary,ref=Bnn
however, the numbers for C and U roads do not get put on roadsigns in NI.
So I believe the agreed-upon correct tagging scheme is:
*C: highway=tertiary, highway_authority_ref=Cnnn
*U: highway=unclassified, highway_authority_ref=Unnn
However it looks to me like the majority of C roads in Northern Ireland have had the ref= tag applied, not highway_authority_ref=
Is this worth fixing en masse with a script?