> On Aug 7, 2015, at 6:07 PM, Martin Koppenhoefer <dieterdre...@gmail.com>
> wrote:
>
> what is this legal name/ shield designation about, the relative importance of
> the highway as a connection in the road network? Or something else like who
> maintains the road (typically more politics and history than traffic logics)?
basically national roads are trunks, regionals are primary, and local numbered
roads are secondary. the un-numbered ones with a center line are tertiary.
http://wiki.openstreetmap.org/wiki/Japan_tagging
<http://wiki.openstreetmap.org/wiki/Japan_tagging>
This wouldn’t be too big a deal if they moved the designations to the bypasses,
but they don’t, and “roads” make right turns at intersections - which is really
odd to me, but that is Japan.
People have a very different expectation when using a visual map - they are
familiar with this odd road pattern (no other map - Google, Apple, Bing,
Mapple, Mapion, Zenrin, and car GPS and others present the data in any other
way), and count traffic lights from the train station or other central city
landmark for completely relative directions - as there are no road names on
tertiary and below nor sequential house address numbers on any building, so the
odd shape of the road grid colors and traffic light mapping is the most
important part of the rendered map (we still cant agree to have one signal icon
per intersection so it breaks this too). - but it really screws with routing.
Javbw
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