Vào lúc 06:47 2023-06-23, Martin Koppenhoefer đã viết:
I believe the US is an exception then, at least the current wiki
confirms what I wrote (and in this case I didn't write it myself ;-) ) ,
from highway=motorway:
Typically highway
<https://wiki.openstreetmap.org/wiki/Key:highway>=motorway should be
*_used only on roads with control of access
<https://en.wikipedia.org/wiki/Controlled-access_highway>_*, or selected
roads with limited access
<https://en.wikipedia.org/wiki/Limited-access_road> depending on the
local context and prevailing convention.
Generally roads with control of access
<https://en.wikipedia.org/wiki/Controlled-access_highway> are proclaimed
in government documents, and have an official status as a controlled
access road, sometimes this can include the term motorway, freeway or
expressway among others in the road name. These kinds of roads usually
have a special designation by the law, with a set of laws specifically
applied on them. Generally some restrictions are placed on the kind of
vehicles or traffic which can be on roads which should be classed as
highway <https://wiki.openstreetmap.org/wiki/Key:highway>=motorway, such
as no pedestrians, bicycles, livestock, horses and so on.
There's probably little disagreement over these criteria as guiding
principles, but the question is how strictly to apply them. I can point
to technical publications, signs, laws, etc. that definitively state the
existence of a particular freeway/motorway/expressway, but I can just as
easily point to exceptions, some of them rather absurd. The definition
already recognizes this possibility by including some "weasel words"
(generally, usually). Moreover, if we venture into a region with less
developed transportation infrastructure, the contrast between a motorway
and everything else will be stark enough that formalities like signs
would be completely unnecessary in all cases.
Ultimately, OSM is a geodatabase, not a legal database. The purpose of
this definition or any other tagging definition is to ensure some degree
of consistency in what the tag is applied to. But if we focus too
pedantically on legal status at the expense of common sense, then we've
reinvented designation=*, and mappers and data consumers have to find
yet another key to express what could've been in highway=*.
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