[HOT] Trunks in Highway Tag Africa

Pierre Béland pierzenh at yahoo.fr
Mon Jan 25 15:40:30 UTC 2021

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. 
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 :  

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

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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