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Jim Avery wrote on 25/08/2010 12:36:
<blockquote
cite="mid:AANLkTimNP1TBR=RYPTO+hW1DAX7qi1x5cCuWBonB7SLy@mail.gmail.com"
type="cite">Personally I think that explicitly tagging roads which
are already by<br>
<pre wrap="">definition cycle-legal as bicycle=yes would be too onerous and not
entirely helpful. There are quite a few roads which are legal but
lethal for cyclists. I think the current advice under the heading
"Bicycle Restrictions" on <a class="moz-txt-link-freetext" href="http://wiki.openstreetmap.org/wiki/Bicycle">http://wiki.openstreetmap.org/wiki/Bicycle</a>
is the most pragmatic approach.
I don't know anything about how OSM maps get translated to GPS
routable maps - I would guess that the most important thing is to be
consistent in our tagging and let the lovely people who make the
routable GPS maps translate them as they feel appropriate.
Anecdotally I'm finding that the better I tag the official cycle
routes and lanes around where I live, the more likely it is that my
GPS will route me on a reasonably pleasant way (not using Velomap here
- thanks for the tip though, I'll take a look at that one too).
</pre>
</blockquote>
<br>
I think "already by definition cycle-legal" is the very point I am
querying. The trouble with the Bicycle restrictions section is that
it falls at the first hurdle as nobody seems to have defined (on an
international basis remember) whether the use of trunk implies
bicycle=yes or no. I wouldn't want to cycle on the A42 (perceived as
a motorway), I have cycled along dual carriageways around Redditch
which are the same in OSM but quite different in quality. The
problems of an administrative definition rather than a "on the
ground" definition even though unless there is explicit sign-age
there is a legal right.<br>
<br>
Anyhow German user perceives the answer to the implied status of
bicycle as an obvious no, a UK user perceives it as an obvious yes,
and the reader of the documentation perceives it as an obvious
undefined. :) That strikes me as fundamentally broken.<br>
<br>
Given that trunk roads are essentially complete, default tagging
should not be onerous.<br>
<br>
Spenny<br>
<br>
<br>
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