I see, I was confused by the Kerb - OpenStreetMap Wiki redirect. If kerb=* is for “additional detail” maybe it should redirect to barrier=kerb instead (or the page changed from a redirect one to a disambiguation one).

Yes, that Wiki page is a mess. I’ve volunteered to improve the page, so I recently started two discussions here to get community feedback and find all the missing uses of barrier=kerb and kerb=* that were not documented in the Wiki: [1], [2]. My summary of what was missing from the Wiki pages is in this post. From reading your comments, I think my understanding aligns with yours. If I’ve missed anything or you have any comments, please let me know in the thread about the Wiki page.

Hi, I have a micromapping question. If I want to draw a traffic_calming=island area, should I map the painted area or the “physical” area? en.wikipedia says: " A traffic island is a solid or painted object in a road that channels traffic", but since sometimes we have other conventions I prefere to ask. Also we could update the OSM wiki to make it clear.

As painted islands do not cause physical separation, it probably does not make much sense to map them as separate objects in OSM?

A kerb is the edge where a road meets a sidewalk. and Tag the node node on the highway=footway, highway=cycleway, or highway=path made me think it can’t be used for traffic islands which are not pedestrian/bicycle crossings like this one.

By all means: if it’s a kerb, use barrier=kerb + kerb=*. A kerb is a kerb. In Germany, we also have kerbs directly on the road sometimes, in order to have vehicles going over it forfeit their right of way. So yes: it’s perfectly fine to use it on any part of the road.

I updated the page for barrier=kerb with the results of those discussions yesterday, and I hope to make the agreed updates to the page for kerb=* in the coming days.

And you’re right … it’s somewhat confusing (specially with the wiki) in such a case and not straightforward, which you might not expect with a traffic island.

As far as I can tell, the tag is only being used for islands that are physically raised, but also have an additional painted area around them. This explains why the two carriageways are split at the point of the traffic island.

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To me, the kerb is just the physical border where the footway and the street meet. So a footway crossing a traffic island usually has two kerb barriers:

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area:highway=* is additionally used to describe the shape of linear features tagged as highway=*. But traffic_calming=island isn’t a highway=* tag and also it’s already possible to map it as an area, so I don’t really see the point of it in this specific case.

Neither! This should not be tagged with traffic_calming=* at all. Mentioned structure does not impose calming the traffic. Use area:highway=traffic_island instead.

Considering what you wrote, in this case (when there’s a solid area inside of a larger painted area), I therefore propose to map the painted area as traffic_calming=island and the physical one as barrier=kerb + kerb=*. if there’s consensus I could edit the Tag.traffic_calming=island wiki page adding this tagging schema. Let me know everyone (you can add a or if you don’t want to comment).

All the areas, overpass turbo, tagged with traffic_calming=island or painted_island should be retagged with area:highway=traffic_island.

EDIT: By the way, I also found this: Tag:traffic_calming=painted_island… It’s so confusing, also because all these elements aren’t linked to each other in the Wiki. I added a reference to them in the Tag:traffic_calming=island “See also” section.

you could also use =apron for a surmountable elevation, often used at roundabout paved inner circle, where the hgv combination last wheels need to take it, to make the curve. truck apron. On the inside or outside of a curve.

The wiki page for kerb=* could really be improved IMO (the text is too much focussed on the use for single nodes e.g. on crossing ways). For me, it’s generally a subtag of barrier=kerb to specify the kind of a kerb. The use on single nodes is a special case or only one case.

A kerb is the edge where a road meets a sidewalk. and Tag the node node on the highway=footway, highway=cycleway, or highway=path made me think it can’t be used for traffic islands which are not pedestrian/bicycle crossings like this one.

I’m not sure I understood what’s the current situation. traffic_calming=island should be changed with area:highway=traffic_island while for traffic_calming=painted_island there’s still no consensus between area:highway=traffic_island, area:highway=emergency and area:highway=buffer? Is this correct?

traffic_calming=painted_island is not area:highway=traffic_island . It is listed as area:highway=emergency , and opposed in Proposal talk:Street area - OpenStreetMap Wiki with several ideas. area:highway=buffer would be consistent with cycleway:*:buffer= related to Proposal:Separation - OpenStreetMap Wiki in general.

In case mapping the painted area is the correct option, is there a way to map the physical one as well? I was thinking of barrier=kerb closed way but I read is to be used only for sidewalks, which is not the case.

Hi, I have a micromapping question. If I want to draw a traffic_calming=island area, should I map the painted area or the “physical” area? en.wikipedia says: " A traffic island is a solid or painted object in a road that channels traffic", but since sometimes we have other conventions I prefere to ask. Also we could update the OSM wiki to make it clear.