If you wish to alter the names, go ahead. I tied up the road classification based upon the status of the roads they connect to/from (the tertiary and secondary). Note that tertiary roads do not have to follow a C-route also.

See osm.wiki/Key:maxspeed:type?uselang=en-GB#United_Kingdom

Please see the wiki for correct maxspeed:type tags and correct lit tags

Are you sure osm.org/way/165220698/ has a speed limit of 39mph?

Please remember to update maxspeed:type tags when changing maxspeed tags

Please remember to update maxspeed:type tags when changing maxspeed tags

Yeah the spacing of street lights does matter, however if there are no repeater signs and the road is lit in some way it's probably appropriate to use "maxspeed:type=GB:nsl_restricted" rather than measure the exact distance between lights!

A 30mph zone is NOT the same as a 30mph speed limit, despite the terms used interchangeably in common speak in the UK. Yes, many roads in the New Forest are part of a 40mph zone (maxspeed:type=GB:zone40), however many roads around the waterside and Totton have a 40mph speed limit (maxspeed:type=sign). There is no such '30 zone' in the UK, with 30mph roads either applied using repeater signs (maxspeed:type=sign) or street lights (maxspeed:type=GB:nsl_restricted). The "lit" tags should be applied to roads before either of these tags are applied to a road with a 30mph speed limit.

Hi, the tag "maxspeed:type=GB:zone30' is not valid. For a lit 30mph road, the tag "maxspeed:type=GB:nsl_restricted" should be used. For an unlit 30mph road, the tag "maxspeed:type=sign" should be used. If there is no "lit" tag, then no "maxspeed:type" tag should be applied.

Are you sure this is 30mph?

Are you sure this is 30mph?

Are you sure this is 30mph?

Are you sure the 40 limit extends along this entire length of road?

Please remember to change maxspeed:type tags when changing maxspeed tags

While there is a broken centre line, there are also overtaking prohibition signs along the A5 through Pentrefoelas, corresponding with the 40 limit extent.

You have made this almost certainly the only exception to the long-standing highway mapping norms in the UK. Yes, the wiki page for 'key:highway' states the tag "distinguishes roads by function and importance rather by their physical characteristic and legal classification", however this is a general description for the entire world. The specific UK wiki page (osm.wiki/Roads_in_the_United_Kingdom) states clearly the tags to use: “Description: A-roads with non-primary status (signed black on white) -> Tag: highway=primary, highway=primary_link”. Regardless of the signs on the ground, the road status is still a non-primary A-road and as such it needs 'highway=primary' tags. The legal classification is not irrelevant, and I fail to see in any way how mapping as 'highway=primary' would make a "worse map for users" – on the contrary, it will make a better map with consistent mapping.

Why does osm.org/way/184708342 have a maxwidth tag of 4 now?

I am unhappy with this mapping. The road is a designated non-primary A-road and as such should be mapped as "highway=primary". The traffic carried along the road has nothing to do with the mapping of M, A and B-roads in Great Britain.

Hi, the correct tag for a 20 zone is 'maxspeed:type=GB:zone20'

Are you also sure this relation exists? I don't recall seeing any signs forbidding turning when I drove here a few weeks ago?
osm.org/relation/17920242