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

Martin Vonwald imagic.osm at gmail.com
Tue May 15 12:25:35 BST 2012

2012/5/15 Josh Doe <josh at joshdoe.com>:
>> The longer I think about it, the more I'm asking myself: do we really
>> need a tag for this? If someone doesn't want to map it as loop, why
>> not simply end the road without any additional tag? What information
>> are we missing then, that we are not missing if we use a single tag
>> instead of a loop?
> A simple answer is that people will want to tag it. :) I think most
> people tag highway=turning_circle not because they want to include
> information indicating that large vehicles can turn around, but
> because it makes the map prettier.

Yes, yes - the good, ol' map-for-the-renderer ;-) But you are right.

> Why don't we keep it simple and just use highway=turning_circle and
> turning_circle=island, since it's more akin to a turning_circle than a
> roundabout, and I doubt any data consumers other than rendering
> currently do anything with turning_circles. We could use
> highway=turning_loop also, if people have problems with using a
> dependent key. I suggest rendering this as a turning_circle with a dot
> in the middle, similar to a mini_roundabout but with a larger circle
> (indicating that the area is wider than the roadway with a "turning
> loop", which is not the case with a mini_roundabout).

I would really like to keep turning_circle as clean as possible and
use e.g. turning_loop for this. But I'm 99.9% sure that people will
not use it, because it is not rendered on the map!!!!!111 ;-)

Any more opinions/suggestions for this issue?

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