[Tagging] roundabouts without obstacles in the middle

Gerd Petermann GPetermann_muenchen at hotmail.com
Tue Nov 3 16:53:00 UTC 2015


Hi Colin,


yes, I think for most drivers the  destinction between the two types is

not needed. I guess that a routing software specilized for large vehicles

would also be able to interpret the circular shape like a

highway=passing_place.


Gerd


________________________________
Von: Colin Smale <colin.smale at xs4all.nl>
Gesendet: Dienstag, 3. November 2015 17:35
An: tagging at openstreetmap.org
Betreff: Re: [Tagging] roundabouts without obstacles in the middle






Hi Gerd,

Personally from a navigation point of view I expect roundabouts and mini-roundabouts to be treated the same, i.e. "take the first exit at the roundabout" not simply "turn right". In the UK (where there are lot of mini-roundabouts) you are expected to drive "around" a painted mini-roundabout, and not "over" it, unless the size of your vehicle makes it impossible to do otherwise. So I see the main difference being in the way they are tagged in OSM: circular way with junction=roundabout, or a simple node with highway=mini_roundabout. The radius of the roundabout is not involved in the distinction, only the way it is mapped.

In NL there are many small roundabouts with a proper round obstacle in the middle, but different surfaces for the inner "lane" and the outer "lane" such that you are subconsciously led to follow the outer lane. There is no actual barrier or law stopping you using the inner lane however. These roundabouts are almost a hybrid between grown-up roundabouts with the central obstacle, and mini-roundabouts with no physical obstacle at all.

Colin

On 2015-11-03 17:14, Gerd Petermann wrote:

Hi all,



I think the wiki

http://wiki.openstreetmap.org/wiki/Tag:junction%3Droundabout

is very clear about this, one has to connect the roads in a single node

and add the tag highway=mini_roundabout.

However, there seems to be a need to draw a circular way instead.



See my discussion with ij_

http://www.openstreetmap.org/changeset/11603397#map=16/60.2119/25.1869



I found a few cases where mappers added mini_roundabout=yes as an attribute,

I'd also be happy with e.g.

center_barrier=no

or just barrier=no

as an attribute on the ways which make up the junction=roundabout.

I also saw a few junction=mini_roundabout on circular ways.

Why not?



Your thoughts?



Gerd









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