[Talk-us] US Trunk road tagging

[Paul Johnson]

On Fri, May 7, 2021 at 1:05 AM Mateusz Konieczny via Talk-us
<talk-us at openstreetmap.org> wrote:
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> May 6, 2021, 21:53 by baloo at ursamundi.org:
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> On Thu, May 6, 2021 at 2:37 PM Minh Nguyen <minh at nguyen.cincinnati.oh.us> wrote:
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> Vào lúc 21:41 2021-05-05, Adam Franco đã viết:
> > At this point I'm thinking of the
> > highway=trunk,primary,secondary,tertiary,unclassified,residential values
> > as simply funny labels for descending numerical values of
> > connectivity-importance. I'm now on board with the position that only
> > motorway implies any physical characteristics.
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> Whoever came up with the original admin_level=* framework was brilliant:
> by starting out using only even numeric values, it became possible for
> some regions to slot in odd values, ensuring a rough consistency across
> regions while accommodating important distinctions peculiar to a
> particular region. If the admin_level=7 slot weren't waiting to be used,
> I don't know what Ohio and Indiana would've done about townships.
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> Yeah, I'd honestly be OK with dropping highway=* values other than
> bridleway, path, footway, cycleway and road entirely and moving the
> hierarchical view to highway_level analogous to the admin-level.
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> What would be a difference? highway=* effectively is that,
> with sole difference that it is using text names rather than numbers.

Effectively adds more levels easily, and allows better differentiation
for situations like a small cycleway in a bicycle parking facility
versus part of a divided bicycle freeway, for one.  And disconnects it
from a specific hierarchy that it's increasingly apparent really only
works for the UK.