[OSM-talk] Highway=trunk : harmonization between countries ?

[Colin Smale]

Hi Djakk, 

Interesting approach, which might work for Europe, but at the moment I
am not entirely convinced. What is strategic at a European level might
not be so strategic locally, and vice versa. The European numbers are
also not signposted everywhere, so there may be a challenge of
verifiability. I believe the European definition basically defines the
endpoints and a few waypoints, and it is left to national authorities to
join the dots as they wish. So it may or may not achieve your goal of
having a harmonised definition between countries. 

Are you actually sure there is a problem to be solved? Do you have
examples of inappropriate or inconsistent use of highway=trunk? 

//colin

On 2017-08-19 11:50, djakk djakk wrote:

> Hello Colin,  
> 
> I'm from Brittany, west part of France :) 
> 
> There is an equivalent of the "autoweg" sign in France. It is also tagged with motorroad=yes. https://fr.m.wikipedia.org/wiki/Panneau_d%27indication_d%27une_route_à_accès_réglementé_en_France [1] 
> 
> So I was thinking using "highway=trunk" for strategic roads, not only for motor roads, all over the world ...  
> For example in the Netherlands : https://www.openstreetmap.org/#map=14/51.8977/4.2042 the N57, primary highway between a trunk and a motorway, becomes trunk in the new tagging system ... 
> An other example, each European road which is not a motorway should be tagged as a trunk road , it is not currently the case in France : https://www.openstreetmap.org/way/42344655#map=15/46.4275/0.6306 
> 
> djakk 
> 
> Le ven. 18 août 2017 à 22:43, Colin Smale <colin.smale at xs4all.nl> a écrit : 
> 
> In the UK it is a specific road class, with its own style of signage. So it is easily verifiable whether a road is a Trunk Road or not. Some Trunk Roads are motorway-like, but others are standard two-way roads. So actually it is not so much linked to the construction of the road, but to the fact that the route is part of the government's strategic route network. 
> 
> In most/many other countries this distinction does not exist, so the use of highway=trunk may become subjective unless a suitable definition is found. For example, in the Netherlands an "autoweg" is usually mapped to highway=trunk. These roads are indicated by a standard sign which you may recognise (I don't know where you come from I'm afraid): 
> 
> https://nl.wikipedia.org/wiki/Autoweg#/media/File:Nederlands_verkeersbord_G3.svg
> 
> //colin 
> 
> On 2017-08-18 22:00, djakk djakk wrote: 
> Hello,  
> 
> highway=trunk is very different between countries, in France it is used for motorway-like roads (dual carriageway), so the same road is sometimes highway=primary and sometimes highway=trunk (example with the N7 road : http://www.openstreetmap.org/#map=13/46.6303/3.2700), whereas in England or in Japan highway=trunk is used like a highway=super-primary tag even if the road is a urban street or a classic road (example : http://www.openstreetmap.org/#map=17/51.62060/-0.78353).  
> 
> Should it be harmonized to the England standard ? 
> 
> djakk 
> 
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Links:
------
[1]
https://fr.m.wikipedia.org/wiki/Panneau_d%27indication_d%27une_route_%C3%A0_acc%C3%A8s_r%C3%A9glement%C3%A9_en_France
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