diff --git a/src/road_cmd.cpp b/src/road_cmd.cpp
index eee9e24efb..e9032cbaaf 100644
--- a/src/road_cmd.cpp
+++ b/src/road_cmd.cpp
@@ -1964,12 +1964,15 @@ static_assert(lengthof(_town_road_types_2) == HZB_END);
 static void TileLoop_Road(TileIndex tile)
 {
 	switch (_settings_game.game_creation.landscape) {
-		case LT_ARCTIC:
-			if (IsOnSnow(tile) != (GetTileZ(tile) > GetSnowLine())) {
+		case LT_ARCTIC: {
+			/* Roads on flat foundations use the snow level of the height they are elevated to. All others use the snow level of their minimum height. */
+			int tile_z = (std::get<Slope>(GetFoundationSlope(tile)) == SLOPE_FLAT) ? GetTileMaxZ(tile) : GetTileZ(tile);
+			if (IsOnSnow(tile) != (tile_z > GetSnowLine())) {
 				ToggleSnow(tile);
 				MarkTileDirtyByTile(tile);
 			}
 			break;
+		}
 
 		case LT_TROPIC:
 			if (GetTropicZone(tile) == TROPICZONE_DESERT && !IsOnDesert(tile)) {