--- a/src/terraform_gui.cpp	Sun Jan 06 01:06:12 2008 +0000
+++ b/src/terraform_gui.cpp	Sun Jan 06 11:39:40 2008 +0000
@@ -106,7 +106,7 @@
 			DoCommandP(end_tile, start_tile, 0, CcPlaySound10, CMD_CLEAR_AREA | CMD_MSG(STR_00B5_CAN_T_CLEAR_THIS_AREA));
 			break;
 		case DDSP_RAISE_AND_LEVEL_AREA:
-			DoCommandP(end_tile, start_tile, 1, CcTerraform, CMD_LEVEL_LAND| CMD_MSG(STR_0808_CAN_T_RAISE_LAND_HERE));
+			DoCommandP(end_tile, start_tile, 1, CcTerraform, CMD_LEVEL_LAND | CMD_MSG(STR_0808_CAN_T_RAISE_LAND_HERE));
 			break;
 		case DDSP_LOWER_AND_LEVEL_AREA:
 			DoCommandP(end_tile, start_tile, (uint32)-1, CcTerraform, CMD_LEVEL_LAND | CMD_MSG(STR_0809_CAN_T_LOWER_LAND_HERE));

--- a/src/tunnelbridge_cmd.cpp	Sun Jan 06 01:06:12 2008 +0000
+++ b/src/tunnelbridge_cmd.cpp	Sun Jan 06 11:39:40 2008 +0000
@@ -418,7 +418,7 @@
 		}
 	}
 
-	if (flags & DC_EXEC) {
+	if (flags & DC_EXEC && railtype != INVALID_RAILTYPE) {
 		Track track = AxisToTrack(direction);
 		SetSignalsOnBothDir(tile_start, track);
 		YapfNotifyTrackLayoutChange(tile_start, track);