[Tagging] Classification of roads in the CBD?

[Mateusz Konieczny]

Mar 14, 2022, 06:07 by graemefitz1 at gmail.com:

> How should they be mapped? By the amount of traffic they carry, or what?
>
Definitely no.

highway=trunk/primary/secondary/tertiary/residential/unclassified/service/track
 should be selected by their importance and role in road network.

(highway=motorway/living_street/pedestrian are special roads)

Note that highway=tertiary may carry a very different amount of vehicles in different
cities.

highway=tertiary in my city may carry more traffic than highway=trunk through
Siberia or through a jungle

Though official road classification, quality and amount of traffic are very likely to be
correlated with road importance in a given area.

But one should not assign highway=* values solely on road quality, amount of traffic
or base it solely on official classification - almost always there will be some exceptions
and this can work only on some limited area and completely fails when the
same rule is applied worldwide (highway=trunk can be unpaved, some highway=residential
are dual carriageways, there are paved highway=track etc)

I opened https://www.openstreetmap.org/note/1985557 because situation where
every single road in a given area is tagged highway=secondary is very likely
indicating problems.

It is better now with some degraded to highway=tertiary but still seems overly
inflated (but I never visited that place, that is why I opened note rather than
editing).
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