[
  {
    "type": "overmap_terrain",
    "id": "road",
    "name": "road",
    "copy-from": "generic_transportation",
    "travel_cost_type": "road",
    "color": "dark_gray",
    "see_cost": "none",
    "extras": "road",
    "flags": [ "LINEAR", "REQUIRES_PREDECESSOR" ]
  },
  {
    "type": "overmap_terrain",
    "id": "bridge",
    "copy-from": "generic_bridge",
    "travel_cost_type": "road",
    "color": "blue",
    "flags": [ "RAVINE" ]
  },
  {
    "type": "overmap_terrain",
    "id": "bridge_road",
    "copy-from": "generic_bridge",
    "travel_cost_type": "road",
    "name": "bridge structure",
    "flags": [ "RAVINE" ]
  },
  {
    "type": "overmap_terrain",
    "id": "bridgehead_ground",
    "copy-from": "generic_bridge",
    "name": "bridgehead (ground)",
    "travel_cost_type": "road",
    "sym": "v",
    "extras": "road",
    "flags": [ "RAVINE_EDGE" ]
  },
  {
    "type": "overmap_terrain",
    "id": "bridgehead_ramp",
    "copy-from": "generic_bridge",
    "name": "bridgehead structure",
    "sym": "^",
    "travel_cost_type": "road",
    "flags": [ "RAVINE_EDGE" ]
  }
]
