iD/data/presets/fields/traffic_sign/direction.json

{
    "key": "traffic_sign:direction",
    "type": "combo",
    "label": "Direction Affected",
    "strings": {
        "options": {
          "forward": "Forward",
          "backward": "Backward",
          "both": "Both / All"
        }
    },
    "geometry": [
        "vertex"
    ]
}