diff -r 86af33783c5e -r f3889bf9d638 src/road_cmd.cpp
--- a/src/road_cmd.cpp	Sat Sep 13 17:26:44 2008 +0000
+++ b/src/road_cmd.cpp	Sat Sep 13 17:37:18 2008 +0000
@@ -523,10 +523,11 @@
 				} break;
 
 				case ROAD_TILE_CROSSING:
-					if (HasTileRoadType(tile, rt)) return_cmd_error(STR_1007_ALREADY_BUILT);
 					other_bits = GetCrossingRoadBits(tile);
 					if (pieces & ComplementRoadBits(other_bits)) goto do_clear;
 					pieces = other_bits; // we need to pay for both roadbits
+
+					if (HasTileRoadType(tile, rt)) return_cmd_error(STR_1007_ALREADY_BUILT);
 					break;
 
 				default:
@@ -578,11 +579,12 @@
 
 		case MP_STATION: {
 			if (!IsDriveThroughStopTile(tile)) goto do_clear;
-			if (HasTileRoadType(tile, rt)) return_cmd_error(STR_1007_ALREADY_BUILT);
 
 			RoadBits curbits = AxisToRoadBits(DiagDirToAxis(GetRoadStopDir(tile)));
 			if (pieces & ~curbits) goto do_clear;
 			pieces = curbits; // we need to pay for both roadbits
+
+			if (HasTileRoadType(tile, rt)) return_cmd_error(STR_1007_ALREADY_BUILT);
 		} break;
 
 		case MP_TUNNELBRIDGE: