[Tagging] roundabouts without obstacles in the middle

Colin Smale colin.smale at xs4all.nl
Tue Nov 3 16:35:53 UTC 2015


 

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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