diff --git a/data/json/overmap/overmap_special/highway_specials.json b/data/json/overmap/overmap_special/highway_specials.json
index 43915992ac467..b8e4bfaf454e9 100644
--- a/data/json/overmap/overmap_special/highway_specials.json
+++ b/data/json/overmap/overmap_special/highway_specials.json
@@ -257,10 +257,10 @@
       { "point": [ 1, 6, 0 ], "overmap": "hw_clover_leaf_1_6" },
       { "point": [ 0, 7, 0 ], "overmap": "hw_three_lane_merge_e_south" },
       { "point": [ 1, 7, 0 ], "overmap": "hw_road_south" },
-      { "point": [ -1, -1, 1 ], "overmap": "hw_railings" },
-      { "point": [ 0, -1, 1 ], "overmap": "hw_railings" },
-      { "point": [ 1, -1, 1 ], "overmap": "hw_railings" },
-      { "point": [ 2, -1, 1 ], "overmap": "hw_railings" },
+      { "point": [ -1, -1, 1 ], "overmap": "hw_railings_north" },
+      { "point": [ 0, -1, 1 ], "overmap": "hw_railings_north" },
+      { "point": [ 1, -1, 1 ], "overmap": "hw_railings_north" },
+      { "point": [ 2, -1, 1 ], "overmap": "hw_railings_north" },
       { "point": [ -1, 0, 1 ], "overmap": "hw_clover_leaf_bridge_-1_0" },
       { "point": [ 0, 0, 1 ], "overmap": "hw_clover_leaf_bridge_0_0" },
       { "point": [ 1, 0, 1 ], "overmap": "hw_clover_leaf_bridge_0_0" },
@@ -269,10 +269,10 @@
       { "point": [ 0, 1, 1 ], "overmap": "hw_clover_leaf_bridge_0_1" },
       { "point": [ 1, 1, 1 ], "overmap": "hw_clover_leaf_bridge_0_1" },
       { "point": [ 2, 1, 1 ], "overmap": "hw_clover_leaf_bridge_2_1" },
-      { "point": [ -1, 2, 1 ], "overmap": "hw_railings" },
-      { "point": [ 0, 2, 1 ], "overmap": "hw_railings" },
-      { "point": [ 1, 2, 1 ], "overmap": "hw_railings" },
-      { "point": [ 2, 2, 1 ], "overmap": "hw_railings" }
+      { "point": [ -1, 2, 1 ], "overmap": "hw_railings_north" },
+      { "point": [ 0, 2, 1 ], "overmap": "hw_railings_north" },
+      { "point": [ 1, 2, 1 ], "overmap": "hw_railings_north" },
+      { "point": [ 2, 2, 1 ], "overmap": "hw_railings_north" }
     ],
     "locations": [ "land", "highway" ],
     "occurrences": [ 0, 0 ],
@@ -335,8 +335,8 @@
       { "point": [ 2, 3, 0 ], "overmap": "hw_trumpet_2_3_north" },
       { "point": [ 0, 4, 0 ], "overmap": "hw_trumpet_0_4_north" },
       { "point": [ 1, 4, 0 ], "overmap": "hw_trumpet_1_4_north" },
-      { "point": [ 0, -1, 1 ], "overmap": "hw_railings" },
-      { "point": [ 1, -1, 1 ], "overmap": "hw_railings" },
+      { "point": [ 0, -1, 1 ], "overmap": "hw_railings_north" },
+      { "point": [ 1, -1, 1 ], "overmap": "hw_railings_north" },
       { "point": [ 0, 0, 1 ], "overmap": "hw_trumpet_bridge_0_0_north" },
       { "point": [ 1, 0, 1 ], "overmap": "hw_trumpet_bridge_1_0_north" },
       { "point": [ 0, 1, 1 ], "overmap": "hw_trumpet_bridge_0_1_north" },
diff --git a/data/json/overmap/overmap_terrain/overmap_terrain_special.json b/data/json/overmap/overmap_terrain/overmap_terrain_special.json
index 47e334325cf58..933395fc81a2b 100644
--- a/data/json/overmap/overmap_terrain/overmap_terrain_special.json
+++ b/data/json/overmap/overmap_terrain/overmap_terrain_special.json
@@ -137,14 +137,15 @@
       "mil_base_8h1",
       "mil_base_8i1",
       "mil_base_8j1",
-      "s_gas_g0_roof"
+      "s_gas_g0_roof",
+      "hw_railings"
     ],
     "copy-from": "generic_air"
   },
   {
     "type": "overmap_terrain",
     "copy-from": "generic_air",
-    "id": [ "special_air", "lab_subway_vent_shaft_roof", "hw_railings" ],
+    "id": [ "special_air", "lab_subway_vent_shaft_roof" ],
     "flags": [ "NO_ROTATE" ]
   },
   {