[
  {
    "type": "palette",
    "id": "highway_palette",
    "terrain": {
      "'": "t_open_air",
      ";": "t_sidewalk",
      ".": "t_pavement",
      "*": "t_pavement_y",
      "|": "t_guardrail",
      "g": [ [ "t_region_groundcover_urban", 2 ], [ "t_region_grass", 1 ], [ "t_region_groundcover", 1 ] ],
      "_": "t_ramp_up_low",
      "<": "t_ramp_up_high",
      ">": "t_ramp_down_low",
      "‾": "t_ramp_down_high",
      "#": "t_strconc_wall"
    }
  }
]
