@openstreetmap/id-tagging-schema/data/presets/traffic_calming/island.json

The OpenStreetMap tagging model used by the iD editor

{
    "icon": "temaki-diamond",
    "fields": [
        "surface"
    ],
    "geometry": [
        "vertex"
    ],
    "terms": [
        "circle",
        "roundabout",
        "slow"
    ],
    "tags": {
        "traffic_calming": "island"
    },
    "name": "Traffic Calming Island"
}