Hi all,
Is there a reason that the National Routes are inconsistently tagged?
They seem to be tagged as "Motorways" near some towns/cities, and as
"trunk road" away from these centres. The change from one to the other
appears entirely arbitrary, for example the change along the N2 near
Stanger (KwaDukuza) in KZN:
http://www.openstreetmap.org/edit#map=18/-29.32051/31.34650
Similar baffling changes are present in other places, across the
country though. These can be identified by a change of the road from
blue to green in the standard OSM layer.
Examples of arbitrary changes that I have personal knowledge of the
associated area:
* Near Van Reenen:
http://www.openstreetmap.org/#map=14/-28.4572/29.5439
* North and west of Port Shepstone:
http://www.openstreetmap.org/#map=12/-30.6497/30.5015
* Near Gonubie and Berlin in the East London area:
http://www.openstreetmap.org/#map=12/-32.9401/27.7645
* North and West of Port Elizabeth:
http://www.openstreetmap.org/#map=11/-33.8539/25.4498
As a related issue, Durban has multiple "motorway"s within the city
area.
I can see there being area where the N2, for example, does not match
the description for a motorway, but the transitions from motorway to
trunk road are then in the wrong places, since there is no significant
change in road quality or design at the points I have highlighted.
Any comments?
mtb
Relevant wiki links:
http://wiki.openstreetmap.org/wiki/Key:highway
http://wiki.openstreetmap.org/wiki/Tag:highway%3Dtrunk
http://wiki.openstreetmap.org/wiki/Tag:highway%3Dmotorway
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