[Talk-us] Announcing progress: Minnesota Highway classification project publishes first guidance

[Paul Johnson]

On Thu, Jan 27, 2022 at 12:21 PM Evin Fairchild <evindfair at gmail.com> wrote:

>
>
> On Thu, Jan 27, 2022, 9:34 AM Paul Johnson <baloo at ursamundi.org> wrote:
>
>>
>> Motorway islands?  You mean a grade-seperated exit on an expressway?  I
>> can't see a compelling reason to not just tag that the same as an
>> expressway (since junctions can be a mix grade separated or at grade) any
>> more than it makes sense to tag motorway all the way to an at-grade
>> junction (which turns motorway into a trolltag).
>>
>
> As for motorway islands, I don't see anything wrong with these as long as
> there's not just one interchange sandwiched between at grade interesctions.
> I think everybody can agree that it's bad tagging to tag a road as motorway
> when there's only one interchange. I change these back to trunk whenever I
> come across them without hesitation.
>
> However, there are many valid cases where a road that is an expressway
> upgrades to motorway for just 2-3 (or more) consecutive interchanges, for
> example an expressway in a rural area that upgrades to freeway when it
> bypasses a town and has at least two interchanges providing access to that
> town, and this should be tagged as motorway. I've never seen a problem with
> this.
>

Right, I can understand this, that's something that comes up around a lot
of midsize (5000ish) population towns across America.


> The only thing that should be clarified on the MN highway classification
> page is that we shouldn't have sections of motorway with just one
> interchange.
>
> Also, why is it bad to have a motorway end at an at grade intersection?
> How does this turn motorway into a "trolltag" (lol)? I've explained my
> position on this many times and I'd like to hear yours.
>

Except for highly unusual, rarely used and heavily restricted cases,
freeways don't have at-grade intersections.  Expressways do.  If you have
an at-grade intersection on what you're looking at, and it's perfectly
legal to cross, enter and leave the highway there, you're not looking at a
freeway.
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