[Talk-us] non-round roundabouts

[Paul Johnson]

Being locally familiar with the I 5 at Dike Access Road example, having a
single way in the middle of this dogbone interchange is appropriate (the
dogbone is not divided).  The ends of the dogbone are roundabouts, but all
traffic must turn out of the ring when approaching the underpass way. An
"only straight on" would be the right move, making a relation
"type=junction, junction=roundabout" on the roundabout ways for each
roundabout.

Having two ways in the middle would be appropriate for a true dogbone.

On Tue, Aug 7, 2012 at 8:46 AM, David ``Smith'' <vidthekid at gmail.com> wrote:

> Seems to me the simplest solution would be to map the two roundabouts as
> one peanut-shaped roundabout: narrow, but not self-intersecting, in the
> middle.
> On Aug 7, 2012 12:39 AM, "Dion Dock" <dion_dock at comcast.net> wrote:
>
>> Maybe you've seen this before, but I haven't.  Here are some roundabouts
>> that are teardrop shaped; the intersection somewhat resembles a dumbbell.
>>  Is there supposed to be a "no left turn" restriction?  Are these even
>> roundabouts?
>>
>> http://www.openstreetmap.org/?lat=45.92721&lon=-122.75631&zoom=16&layers=M
>>
>> -Dion
>>
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