[OSM-talk-be] Routing in Liège

[Julien Fastré]

Le 13/09/16 à 20:18, André Pirard a écrit :
> On 2016-09-13 18:21, Marc Gemis wrote:
>> Hallo,
>>
>> I was contacted by a mapper from Germany with whom I worked on turn:lanes.
>> He has to following question, can someone with local knowledge inform
>> us about the road classifications ? I have the impression a lot of
>> streets are indeed residential. Feel free to reply in French, I'll
>> translate it to English for him.
> Hi,
> 
> The overpass map doesn't show Liège but the North of it.
> When run, I can't make sense of what I see.
> Could you get rid of the nodes?
> 
> In Liège, most of the ways are residential, of course.
> You can see not yet mapped buildings by displaying the BE PICC layer.
> But, beside surrounding and access motorways, some ways are suitable for
> slower, through traffic.
> Those are brown on OSM.org and mainly: alongside Meuse and Dérivation,
> rue de l'Yser to Ans, N3, N61, N30, N63, N90. (...?)
> Notably missing the brown status is N671 for carrying the heavy traffic
> in direction Namur.
> (The rule is that brown, main National, primary roads are 1 or 2 digits,
> but 671 certainly deserves that).
> Beside that, there are yellow, secondary wider streets bordered by
> buildings like Boulevard de la Sauvenière that can be used for faster
> moving inside town but isn't recommended for traveling through.
> 
> I'm not mapping Liège and I don't know every small streets of it
> everywhere, but I can comment specifics like N671 if no one else stands
> up in this thread.
> 
> Cheers
> 
> André.
> 
> 
> 
> 
>>
>>
>> [snipped]
>> Now I want ask you about another problem.
>> Coming from here
>> http://forum.mapfactor.com/discussion/comment/13515#Comment_13515
>> I checked Liege to find out the mapping of roads there:
>> http://overpass-turbo.eu/s/imn
>> My guess is, that unclassified is used wrong there and that is the
>> reason for strange routings. My opinion is that unclassified as the
>> lowest kind of connecting roads do not end at city borders and have or
>> need common connection to same or higher class inside of towns or
>> villages. For me routers should avoid residentials and lower as much
>> as possible. Do you have any idea to check and correct this in Liege
>> to make routing better?
>>
>> If there are any questions, please ask.
>>
>> Regards
>> Michael aka hurdygurdyman
>>

Hi,

I had a look at the link in overpass-turbo and it seems to me that it is
quite good according to this:
http://wiki.openstreetmap.org/wiki/WikiProject_Belgium/Conventions/Highways

But I do agree that some road, like En féronstrée
(http://www.openstreetmap.org/way/37341977) et Hors Chateau
(http://www.openstreetmap.org/way/62360375) or rue de la Régence
(http://www.openstreetmap.org/way/281936236), which count a lot of
house, could also be considered as "connection to same or higher class
inside of towns or villages".

But, in the wiki, unclassified road are described as :

> Small paved ways, no connecting roads, that typically are located in
rural areas. Houses/building are exceptional.

And, on the page Tag=highway=unclassified :
http://wiki.openstreetmap.org/wiki/Tag:highway%3Dunclassified

> The tag highway=unclassified is used for minor public roads typically at the lowest level of the interconnecting grid network. Unclassified roads have lower importance in the road network than tertiary roads, and are not residential streets or agricultural tracks. highway=unclassified should be used for roads used for local traffic and used to connect other towns, villages or hamlets. Unclassified roads are considered usable by motor cars. 


So I wonder if the wikiprojectBelgium is wrong for this description...

Julien

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