Tag:traffic_calming=island
 traffic_calming = island
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A traffic calming island is a structure for the purpose of slowing down traffic, temporarily separating two different traffic directions. 
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| Group: highways |
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Status: de facto
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A traffic calming island is a structure for the purpose of slowing down traffic, separating at least two lanes of a highway for a short distance[1]. The width of the island is usually under a few meters. The island doesn't necessarily have to have a right-of-way indicator. The area of the island itself can be drawn using area:highway=traffic_island, but the traffic calming feature is meant to be used as a point on the way itself, or tagged on part of the way.
Note that as of mid April 2023, only about 3% of pedestrian crossings with pedestrian refuges (crossing:island=yes or the deprecated crossing=island) are also tagged with traffic_calming=island. So as a data consumer, if you are looking for all traffic islands, you should look for crossings with the tags mentioned, too.
How to map
For an island between two lanes of a carriageway, either:
- put a
traffic_calming=islandnode on the road (especially if it's a small island), - split the carriageway into parallel lanes, marked
oneway=yesas appropriate, add thetraffic_calming=islandto the ways, and optionally draw the island itself as an area
between them using area:highway=traffic_island.
Tags to use in combination
For traffic calming islands drawn as a node :
direction=*- if an island is made to only slow down traffic in one direction
For traffic islands drawn as an area using area:highway=traffic_island:
surface=*– Surface of the traffic island, e.g.asphalt,paving_stoneslanduse=grass– For traffic islands covered with grass (otherlanduse=*ornatural=*types may also occur, e.g.landuse=greeneryornatural=shrubbery)barrier=kerb+kerb=*– For solid traffic islands
Rendering
- One possible rendering may be as a small hollow dot in the middle of a node, or a small hollow line in the middle of a way. When creating software, these choices are yours.
- None, currently, by the osm-carto layer.
- iD and JOSM editors represents this tag with an icon: Example-object
- OsmAnd has a possibility to alert drivers of incoming
traffic_calming=*features, a warning icon with a speed bump is shown[2].
Possible tagging errors
See also
crossing:island=*– Specifies whether afootway=traffic_islandcrossing has a refuge islandhighway=mini_roundabout– A road junction where the traffic goes around a painted circle or traversable island and has right of way.traffic_calming=painted_island– An island painted on a road- Proposals:
area:highway=traffic_islandis mentioned in a 2011 inactive proposal.- The proposal
landuse=traffic_islandfor a pedestrian refuge on roads was abandoned.
Weblinks
- Traffic island on Wikipedia
References
- ↑ It's not clear yet if this tag is to be used for solid and/or painted islands. As has been pointed out here (Proposed_features/Road_divider_areas, Feb 2022) and here (What’s the traffic_calming=island area?, Feb 2023).
- ↑ OsmAnd Docs - Alert types -https://osmand.net/docs/user/widgets/nav-widgets/#alert-types