[Tagging] Turning circle with island or turning loop (was Re: (Mini)Roundabout: examples

Phil! Gold phil_g at pobox.com
Tue May 15 13:34:41 BST 2012


* Martin Vonwald <imagic.osm at gmail.com> [2012-05-15 14:11 +0200]:
> Now the only issue remaining is: how? Right now I see two solutions:
> 1) highway=turning_circle and turning_circle=island or traffic_calming=island
> 2) new tag like e.g. highway=turning_loop
[snip]
> I would really like to get more opinions from the people using
> turning_circle right now for places with islands.

I usually map loops explicitly, but I have occasionally tagged such places
as highway=turning_circle when I wanted to indicate that there was
something there, but didn't want to spend the time drawing a bunch of
loops.  In such cases, I've used turning_circle, because it seemed the
least-incorrect tag available.

I think I'd prefer highway=turning_loop.  It seems simpler to use one tag
rather than two, since in this case, you could argue that a
turning-area-with-an-island is not really a subtype of a
turning-area-without-an-island.  (Though you could address that by saying
that the two cases are highway=turning_circle, turning_circle=island and
highway=turning_circle, turning_circle=open, with the assumption that a
missing turning_circle tag implies turning_circle=open.)  I don't think it
would be too hard to add a rendering for highway=turning_loop, so if it
gets general approval and no one else beats me to it, I'll try to put
together a patch against the main rendering for it.

-- 
...computer contrarian of the first order... / http://aperiodic.net/phil/
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