Re: [Talk-us] MO Stare Road Classifications.

[Kevin Kenny]

On Sat, Mar 4, 2017 at 10:55 PM,  wrote:

>
>
> I was thinking of using MODOT Functional classification maps to set roads
> to.  Basically the following:
>
>
>
> MODOT : OSM
>
>
>
> Interstate : motorway
>
> Freeway and Expressway : trunk
>
> Other Principal Arterial : primary
>
> Minor Arterial : secondary
>
> Major Collector : tertiary
>
> Minor Collector : unclassified
>
> Local : residential
>
>
>

I'm not a vehement anti-importer (there are a few around here, but I'm not
among them!) but I feel compelled to ask: to what extent do we expect this
classification to be more accurate that what is already there? I come from
a part of the country where the official designations of highways describe
what sort of construction was once authorized, rather than what was
actually built or maintained. There are "county highways" that you'd expect
to be highway=tertiary that are in fact highway=track, for instance. Do we
have reason to expect that the state highway department has more accurate
or complete information than the Census Bureau had?

This caveat goes many-fold if you're looking at doing any sort of automated
reclassification, since there you also have to watch out for undoing the
work of local mappers who are familiar with the roads. If that's what
you're talking about, then it also needs to be talked about on the
'imports' list.
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Re: [Talk-us] MO Stare Road Classifications.

[OSM Volunteer stevea]

> I was thinking of using MODOT Functional classification maps to set roads to. 
>  Basically the following:
>  
> MODOT : OSM
>  
> Interstate : motorway
> Freeway and Expressway : trunk
> Other Principal Arterial : primary
> Minor Arterial : secondary
> Major Collector : tertiary
> Minor Collector : unclassified
> Local : residential

I would say "almost, but not quite."  Interstate and Freeway, both 
highway=motorway.  Expressway, highway=trunk.

The remainder seem correct, except that you might consider Local to also be 
highway=unclassified, unless you know Local to be explicitly abutted by 
residences in all cases, then highway=residential is distinctly correct.

SteveA
California
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Re: [Talk-us] MO Stare Road Classifications.

[Richard Welty]

On 3/5/17 8:22 AM, Mike N wrote:
> Hi,
>
>Typically, regional classifications do not map into OSM
> classification, and often conflict.
>
>   If a freeway / expressway is constructed as an OSM motorway, it
> should be motorway.
>
>   If a 'local' road serves an industrial area it should be
> unclassified because it doesn't serve residences.
>
>And probably others.   Even within OSM in the US, there is not an
> absolute level of classification that has been agreed on and
> verifiable by everyone.
>
> On 3/4/2017 10:55 PM, idn...@gmail.com wrote:
>>
>>
>> I was thinking of using MODOT Functional classification maps to set
>> roads to.  Basically the following:
>>
philosophically, in OSM we tend to focus on things verifiable on the
ground, rather
than things we get from official docs.

i could see setting up a separate namespace which could contain
functional classifications,
but i would object to trying to hijack long established tags which
others are already
working with. we've kind of been there before and it was unfortunate.

richard

-- 
rwe...@averillpark.net
 Averill Park Networking - GIS & IT Consulting
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Re: [Talk-us] MO Stare Road Classifications.

[Paul Johnson]

On Sun, Mar 5, 2017 at 7:22 AM, Mike N  wrote:

> Hi,
>
>Typically, regional classifications do not map into OSM classification,
> and often conflict.
>
>   If a freeway / expressway is constructed as an OSM motorway, it should
> be motorway.
>

The american concept of freeways is unambiguous, though we do have some
oddities with expressways, which we map as trunks.

No/few driveways, usually surface intersections but could also have
motorway-style ramps at higher traffic junctions, or (far more rarely) a
controlled access single carriageway (it's a motorway, but instead of dual
carriageway, it's typically a two lane road at the top of the ramps) would
qualify as a trunk, as well.
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Re: [Talk-us] MO Stare Road Classifications.

[Mike N]

Hi,

   Typically, regional classifications do not map into OSM 
classification, and often conflict.


  If a freeway / expressway is constructed as an OSM motorway, it 
should be motorway.


  If a 'local' road serves an industrial area it should be unclassified 
because it doesn't serve residences.


   And probably others.   Even within OSM in the US, there is not an 
absolute level of classification that has been agreed on and verifiable 
by everyone.


On 3/4/2017 10:55 PM, idn...@gmail.com wrote:



I was thinking of using MODOT Functional classification maps to set
roads to.  Basically the following:



MODOT : OSM



Interstate : motorway

Freeway and Expressway : trunk

Other Principal Arterial : primary

Minor Arterial : secondary

Major Collector : tertiary

Minor Collector : unclassified

Local : residential



You can see maps here:

http://www.modot.org/newsandinfo./functionalclassificationmaps





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Re: [Talk-us] MO Stare Road Classifications.

[Paul Johnson]

On Sat, Mar 4, 2017 at 9:55 PM,  wrote:

>
>
> I was thinking of using MODOT Functional classification maps to set roads
> to.  Basically the following:
>
>
>
> MODOT : OSM
>
>
>
> Interstate : motorway
>
> Freeway and Expressway : trunk
>
> Other Principal Arterial : primary
>
> Minor Arterial : secondary
>
> Major Collector : tertiary
>
> Minor Collector : unclassified
>
> Local : residential
>
>
>
> You can see maps here:
>
> http://www.modot.org/newsandinfo../functionalclassificationmaps
>
>
http://wiki.openstreetmap.org/wiki/United_States_Road_Classification
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