* Checks if a town road can be continued on the other side of a bridge.

 *

 * @param end_tile The end tile of the bridge

 * @param bridge_dir The direction of the bridge

 * @return true if the road can be continued, else false

 */

static bool CanRoadContinueAfterBridge(const Town* t, const TileIndex end_tile, const DiagDirection bridge_dir)

{

	const int delta = TileOffsByDiagDir(bridge_dir); // +1 tile in the direction of the bridge

	TileIndex next_tile = end_tile + delta; // The tile beyond the bridge

	RoadBits rcmd = DiagDirToRoadBits(ReverseDiagDir(bridge_dir));

	RoadType rt = GetTownRoadType(t);

	/* Before we try anything, make sure the tile is on the map and not the void. */

	if (!IsValidTile(next_tile)) return false;

	/* If the next tile is a bridge or tunnel, allow if it's a road bridge/tunnel continuing in the same direction. */

	if (IsTileType(next_tile, MP_TUNNELBRIDGE)) {

		return GetTunnelBridgeTransportType(next_tile) == TRANSPORT_ROAD && GetTunnelBridgeDirection(next_tile) == bridge_dir;

	}

	/* If the next tile is a station, allow if it's a road station facing the proper direction. Otherwise return false. */

	if (IsTileType(next_tile, MP_STATION)) {

		/* If the next tile is a road station, allow if it's facing the same direction, otherwise disallow. */

		return IsRoadStop(next_tile) && GetRoadStopDir(next_tile) == ReverseDiagDir(bridge_dir);

	}

	/* If the next tile is a road depot, allow if it's facing the new bridge. */

	if (IsTileType(next_tile, MP_ROAD)) {

		return IsRoadDepot(next_tile) && GetRoadDepotDirection(next_tile) == ReverseDiagDir(bridge_dir);

	}

	/* If the next tile is a railroad track, check if towns are allowed to build level crossings.

	 * If level crossing are not allowed, reject the bridge. Else allow DoCommand to determine if the rail track is buildable. */

	if (IsTileType(next_tile, MP_RAILWAY) && !_settings_game.economy.allow_town_level_crossings) return false;

	/* If a road tile can be built, the bridge is allowed.

	 * If not, the bridge is rejected. */

	return DoCommand(next_tile, rcmd | (rt << 4), t->index, DC_AUTO | DC_NO_WATER, CMD_BUILD_ROAD).Succeeded();

}

/**

	/* Don't allow a bridge where the start and end tiles are adjacent with no span between. */

	/* Make sure the road can be continued past the bridge. At this point, bridge_tile holds the end tile of the bridge. */

	if (!CanRoadContinueAfterBridge(t, bridge_tile, bridge_dir)) return false;