Index: src/rail_gui.cpp
===================================================================
--- src/rail_gui.cpp	(revision 13003)
+++ src/rail_gui.cpp	(working copy)
@@ -239,7 +239,10 @@
 {
 	if (success) {
 		SndPlayTileFx(SND_20_SPLAT_2, tile);
-		ResetObjectToPlace();
+		/* Do not unselect the tunnel tool if ctrl is pressed */
+		if (!_ctrl_pressed) {
+			ResetObjectToPlace();
+		}
 	} else {
 		SetRedErrorSquare(_build_tunnel_endtile);
 	}
@@ -616,7 +619,10 @@
 
 			switch (e->we.place.select_proc) {
 				case DDSP_BUILD_BRIDGE:
-					ResetObjectToPlace();
+					/* Do not unselect the bridge tool if ctrl is pressed */
+					if (!_ctrl_pressed) {
+						ResetObjectToPlace();
+					}
 					ShowBuildBridgeWindow(start_tile, end_tile, TRANSPORT_RAIL, _cur_railtype);
 					break;
 
Index: src/road_gui.cpp
===================================================================
--- src/road_gui.cpp	(revision 13003)
+++ src/road_gui.cpp	(working copy)
@@ -117,7 +117,10 @@
 {
 	if (success) {
 		SndPlayTileFx(SND_20_SPLAT_2, tile);
-		ResetObjectToPlace();
+		/* Do not unselect the tunnel tool if ctrl is pressed */
+		if (!_ctrl_pressed) {
+			ResetObjectToPlace();
+		}
 	} else {
 		SetRedErrorSquare(_build_tunnel_endtile);
 	}
@@ -569,7 +572,10 @@
 				switch (e->we.place.select_proc) {
 					default: NOT_REACHED();
 					case DDSP_BUILD_BRIDGE:
-						ResetObjectToPlace();
+						/* Do not unselect the bridge tool if ctrl is pressed */
+						if (!_ctrl_pressed) {
+							ResetObjectToPlace();
+						}
 						ShowBuildBridgeWindow(start_tile, end_tile, TRANSPORT_ROAD, RoadTypeToRoadTypes(_cur_roadtype));
 						break;