{

  "minzoom": 12,

  "layout": {

    "visibility": "visible"

  },

  "maxzoom": 24,

  "filter": [

    "all",

    [

      "==",

      "type",

      "rail"

    ],

    [

      "!in",

      "service",

      "yard",

      "siding"

    ]

  ],

  "type": "line",

  "source": "osm",

  "id": "roads_rail",

  "paint": {

    "line-color": "rgba(153, 153, 153, 1)",

    "line-width": {

      "stops": [

        [

          12,

          1

        ],

        [

          13,

          1

        ],

        [

          14,

          1.25

        ],

        [

          20,

          2.25

        ]

      ]

    }

  },

  "source-layer": "transport_lines"

}