mapcomplete/assets/layers/left_right_style/left_right_style.json

{
  "id": "left_right_style",
  "description": "Special meta-style which will show one single line, either on the left or on the right depending on the id. This is used in the small popups with left_right roads. Cannot be included in a theme",
  "source": {
    "osmTags": {
      "or": [
        "id=left",
        "id=right"
      ]
    }
  },
  "mapRendering": [
    {
      "width": 15,
      "color": {
        "render": "#ff000088",
        "mappings": [
          {
            "if": "id=left",
            "then": "#0000ff88"
          }
        ]
      },
      "offset": {
        "render": "-15",
        "mappings": [
          {
            "if": "id=right",
            "then": "15"
          }
        ]
      }
    }
  ]
}