[Tagging] Roudabout, center island, type of a traffic_island?

[Volker Schmidt]

No, you cannot say the wiki is wrong. You can suggest a new tagging for
roundabout centrepieces.
The number of mappers that have used highway=island or
traffic_calming=island for this are a very small fraction of roundabout
mappers.
I guess you would need to make a formal proposal for that extension to the
tag use.


On Wed, 28 Apr 2021 at 19:23, António Madeira <antoniomadeira at gmx.com>
wrote:

> That description is wrong and should be corrected. The wiki states in its
> main text "A traffic island is a structure separating at least two lanes of
> a highway for a short distance."
> Which makes sense, since you can have a highway with two ways in the same
> direction, split with a traffic island in the middle.
>
> Regards,
> António.
>
>
> Às 14:06 de 28/04/2021, Volker Schmidt escreveu:
>
> highway=traffic_island  has no wiki page and 500 uses in Taginfo.
> traffic_calming=island is not applicable for a roundabout centerpiece. The
> wiki page traffic_calming clearly states: "
>
>    - traffic_calming=island
>    <https://wiki.openstreetmap.org/wiki/Tag:traffic_calming%3Disland>
>
> [image: Trafficcalming-island.jpg]
> <https://wiki.openstreetmap.org/wiki/File:Trafficcalming-island.jpg>
> An island is a small area that temporarily separates two different
> directions of traffic. In a roundabout there are no different directions
> of traffic, as it is one-way by definition.
> If we want to map the way how the centerpiece is planted, we should use
> the same tagging as we use for normal land cover. For grass it should,
> landcover=grass, if it's planted with flowers and bushes it becomes a
> leisure=garden.
> If there is a kerb that can be tagged a barrier=kerb.
>
> On Wed, 28 Apr 2021 at 16:38, Peter Elderson <pelderson at gmail.com> wrote:
>
>> I think the central island has a traffic function, but not a routing
>> function. The routing function is in the junction tag of the roundabout
>> way.
>>
>> For road-builders the central Island is definitely an important feature,
>> as are e.g. the splitting Islands, refuge islands, truck apron (the tilted
>> strips  around the Islands  where truck wheels are tolerated).
>>
>> Peter Elderson
>>
>>
>> Op wo 28 apr. 2021 om 16:12 schreef Dave F via Tagging <
>> tagging at openstreetmap.org>:
>>
>>> I don't see it as part of the highway. The road of a roundabout doesn't
>>> interact with; it goes *around* it. Routers know they're on a roundabout
>>> because of the junction= tag.
>>>
>>> They're not really designed to be accessible by foot as per your wiki
>>> pages. Most in my locale are municipally maintained grass so I just mark it
>>> with landuse=grass.
>>>
>>> DaveF
>>>
>>> On 27/04/2021 22:32, Allroads wrote:
>>>
>>> Roundabout.
>>>
>>> Is the center_island of a roundabout a type of a
>>> area:highway=traffic_island?
>>>
>>> I think it is.
>>>
>>> What types of traffic_island can be used?
>>>
>>>
>>> https://en.wikipedia.org/wiki/Traffic_island
>>> https://en.wikipedia.org/wiki/Refuge_island
>>>
>>>
>>>
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