[Talk-us] US Trunk road tagging

[Minh Nguyen]

Vào lúc 07:21 2021-05-07, Zeke Farwell đã viết:
> On Fri, May 7, 2021 at 9:32 AM Paul Johnson 
> <baloo at ursamundi.org 
> <mailto:baloo at ursamundi.org>> wrote:
> 
>     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.
> 
> 
> It works fine for other places.  We do have to work harder at it than 
> the UK does, though.  Our signed routes don't map cleanly to a sensible 
> hierarchy of importance.   Would different names be better?  Sure.  But, 
> it really doesn't feel that hard to do this translation in my head:
> 
> motorway --> level 1
> trunk --> level 2
> primary --> level 3
> secondary --> level 4
> tertiary --> level 5
> unclassified/residential --> level 6

Ah, I thought you were suggesting literally adopting a numeric scheme 
akin to admin_level=*, which mostly skips every other number, leaving 
room for the occasional regional anomaly. If the keywords mapped to 
2/4/6/8/etc., then some region with an unusual type of road could stick 
it in 3 or 5.

For example, the county-branded expressway system in Santa Clara County, 
California, makes a lot of sense to distinguish from both freeways and 
other arterial roads. (Google Maps basically makes this distinction, for 
example.)

But if you were only suggesting a less literal interpretation of the 
keywords, then sorry for the distraction. :-)

-- 
minh at nguyen.cincinnati.oh.us