[Talk-us] [Talk-us-newyork] Highway classification guidelines for New York State

[Eric Patrick]

Isn't UNCLASSIFIED something the Europeans or maybe just the British use
for their designations? Does it have a higher or lower priority than
RESIDENTIAL roads? I did some testing in Oklahoma and found that TERTIARY
and RESIDENTIAL both equal the same. Routing doesn't prefer one over the
other. As Brian had pointed out here, OSM-carto doesn't make that
distinction either.

On Sat, Sep 11, 2021 at 7:18 PM Brian M. Sperlongano <zelonewolf at gmail.com>
wrote:

> Thanks Jason, Kevin, and the NY mapping community for all the hard work
> that's going into this!
>
> Regarding:
>
> There has always been a
>> highway hierarchy with unclassified at the bottom rank, and then
>> residential below that, ie, not ranked at all. Unclassified is for the
>> most minor roads that link locations, residential is for public roads
>> that don't. How these classifications are mapped to reality varies
>> wildly over the globe (the names themselves are nearly meaningless) but
>> the suggestion that we should choose between these two classifications
>> by the *type* of traffic carried -- not by the role in linking
>> locations, the amount of traffic, the distance covered, or the road's
>> routing prominence -- seems like a sharp departure from tagging norms.
>
>
> We had fairly extensive, and quite inconclusive discussions about whether
> unclassified and residential are peers, or whether unclassified is "above"
> residential in the hierarchy.  Certainly from a render perspective,
> openstreetmap-carto and OpenMapTiles (the two I happen to be familiar with)
> do not make any distinction between the two, rendering both of them
> equally.  I've heard it noted that some routers do give unclassified less
> of a router penalty than residential but more than tertiary.
>
> In RI, I've been using unclassified for minor roads that don't qualify for
> residential, service, or track, or tertiary.  For example, a minor road to
> a dead-end industrial area.  The folks up in Vermont have been using it as
> an intermediate level between residential and tertiary.  I don't think
> there's really a right or wrong answer to this question, but it didn't seem
> like from our discussions that it's something we have a consensus or
> settled answer on.
> _______________________________________________
> Talk-us mailing list
> Talk-us at openstreetmap.org
> https://lists.openstreetmap.org/listinfo/talk-us
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/talk-us/attachments/20210911/7a0f4844/attachment-0001.htm>