}

						return_cmd_error(STR_1007_ALREADY_BUILT);

					}

				} break;

				case ROAD_TILE_CROSSING:

					other_bits = GetCrossingRoadBits(tile);

					if (pieces & ComplementRoadBits(other_bits)) goto do_clear;

					pieces = other_bits; // we need to pay for both roadbits

					break;

				default:

				case ROAD_TILE_DEPOT:

					goto do_clear;

			}

			}

			return CommandCost(EXPENSES_CONSTRUCTION, _price.build_road * (rt == ROADTYPE_ROAD ? 2 : 4));

		}

		case MP_STATION: {

			if (!IsDriveThroughStopTile(tile)) goto do_clear;

			RoadBits curbits = AxisToRoadBits(DiagDirToAxis(GetRoadStopDir(tile)));

			if (pieces & ~curbits) goto do_clear;

			pieces = curbits; // we need to pay for both roadbits

		} break;

		case MP_TUNNELBRIDGE:

			if (GetTunnelBridgeTransportType(tile) != TRANSPORT_ROAD) return CMD_ERROR;

			if (MirrorRoadBits(DiagDirToRoadBits(GetTunnelBridgeDirection(tile))) != pieces) return CMD_ERROR;

			if (HasTileRoadType(tile, rt)) return_cmd_error(STR_1007_ALREADY_BUILT);