@openstreetmap/id-tagging-schema/data/fields/junction_line.json

The OpenStreetMap tagging model used by the iD editor

{
    "key": "junction",
    "type": "combo",
    "label": "Junction",
    "strings": {
        "options": {
            "roundabout": "Roundabout",
            "circular": "Traffic Circle",
            "jughandle": "Jughandle"
        }
    },
    "autoSuggestions": false,
    "customValues": false
}