[HOT] Trunks in Highway Tag Africa

Pierre Béland pierzenh at yahoo.fr
Mon Jan 25 17:38:39 UTC 2021

Hi Rafael,

The best yes would be that we add a note adding exception for major road networks such as the Inter-African highway project sponsored by UN, Inter-African Bank and other regional partners. See https://wiki.openstreetmap.org/wiki/WikiProject_Trans-African_Highwaythat describes the OSM relations to describe this network. 

Some infos also in  https://en.wikipedia.org/wiki/Trans-African_Highway_network, where it says that  this is an infrastructure program across Africa and there are not necessarily signs on the roads. 


    Le lundi 25 janvier 2021 11 h 34 min 30 s UTC−5, Rafael Avila Coya <ravilacoya at gmail.com> a écrit :  
 Hi, Pierre:

So we should add that to the wikis, right? Otherwise users will be 
confused as when to use the trunk or primary values.



O 25/01/21 ás 16:40, Pierre Béland via HOT escribiu:
> We have created the Highway tag Africa wiki page in 2013 to reflect the 
> fact that road structures and conditions vary in many countries and the 
> official Highway tag do not reflect this. Many discussions since 2013. 
> It was proposed to use the Trunk classification to reflect 
> inter-regional roads, this independantly of then road structure.  This 
> tagging schema is now quite generally used in countries / areas where 
> infhastructures differ from the «northern countries» standard.
> See this truck stuck on a North-Kivu road at the rainy season.
> https://twitter.com/pierzen/status/1163096946300653570
> Even if the infrastructure is inadequate, this is stil a vital road link 
> in the region.
> Pierre
> Le lundi 25 janvier 2021 08 h 59 min 13 s UTC−5, Fernando Trebien 
> <fernando.trebien at gmail.com> a écrit :
> Hi!
> The current definition of highway=trunk for Africa [1] and East Africa
> [2] appears to reflect mapping practices in some highly developed
> countries that are not common in most developing countries. The two
> points that I find very restrictive:
> 1. Restricted to motorised vehicles: not mandatory even in many
> developed countries [3]
> 2. Motorway-like layout with multiple lanes: does this include single
> carriageways with 2 lanes, 1 lane per direction?
> In the English wiki, the definition of highway=trunk is less
> restrictive, and so are many of its translations. In addition, many
> highways mapped as highway=trunk in Africa (and East Africa) do not
> meet these requirements and apparently did not at the time [4] of the
> edit.
> Sometimes trunk roads may not even be paved. Examples include the
> A-360 [5] and P-504 [6] routes in the Russian Far East and the
> Trans-Amazonian Highway (BR-230) [7] in the North Region of Brazil.
> Iceland's Ring Road [8] was also unpaved until recently in some parts.
> So, I would like to propose changing the definition in [1] to
> something like what the English wiki says: "The most important roads
> in a country's system that are not motorways." Possibly adding that
> these are generally the main routes between very large cities. What do
> you think?
> [1] https://wiki.openstreetmap.org/wiki/Highway_Tag_Africa
> [2] https://wiki.openstreetmap.org/wiki/East_Africa_Tagging_Guidelines
> [3] 
> https://wiki.openstreetmap.org/wiki/OSM_tags_for_routing/Access_restrictions
> [4] 
> https://wiki.openstreetmap.org/w/index.php?title=Highway_Tag_Africa&type=revision&diff=1337238&oldid=1337236
> [5] https://www.openstreetmap.org/?mlat=58.53671&mlon=125.38264
> [6] https://www.openstreetmap.org/?mlat=64.57219&mlon=142.27424
> [7] https://www.openstreetmap.org/?mlat=-3.68545&mlon=-53.56702
> [8] https://www.openstreetmap.org/?mlat=64.78732&mlon=-14.44138
> -- 
> Fernando Trebien
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