On 12/08/2019 14:36, Paul Allen wrote:
Where a country-wide classification exists, it is usual for this to be reflected in the numbering scheme and the signage. In the UK it may not be readily apparent whether a road is a trunk or a primary since they'll both be "A" roads with the same style of signage, but there's an obvious difference in signage between A roads and B roads
Careful. If my understanding is correct, the term 'trunk road' as used in the UK does not map to highway=trunk in OSM. The latter has always I believe been used to represent the 'primary route network' in the UK (excluding the motorways), that is those A roads (and possibly some B roads) which connect the designated 'primary destinations' on the road network. They should be characterized by green signage, which therefore distinguishes them from other A roads which are not part of the primary network (black-and-white signage, confusingly mapped as highway=primary in OSM).
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