gravel/fine_gravel.json

{
    "type": "overpass",
    "name": {
        "en": "Fine Gravel"
    },
    "query": {
        "6": "(node[surface=compacted];way[surface=compacted];node[surface=fine_gravel];way[surface=fine_gravel];)"
    },
    "info": "Compacted or fine gravel."
}