Index: road_cmd.cpp
===================================================================
--- road_cmd.cpp	(revision 20007)
+++ road_cmd.cpp	(working copy)
@@ -185,7 +185,7 @@
 {
 	RoadTypes rts = GetRoadTypes(tile);
 	/* The tile doesn't have the given road type */
-	if (!HasBit(rts, rt)) return CMD_ERROR;
+	if (!HasBit(rts, rt)) return_cmd_error(STR_ERROR_NO_ROAD_HERE + rt);
 
 	switch (GetTileType(tile)) {
 		case MP_ROAD: {
@@ -276,7 +276,7 @@
 
 			/* limit the bits to delete to the existing bits. */
 			pieces &= present;
-			if (pieces == ROAD_NONE) return CMD_ERROR;
+			if (pieces == ROAD_NONE) return_cmd_error(STR_ERROR_NO_ROAD_HERE + rt);
 
 			/* Now set present what it will be after the remove */
 			present ^= pieces;
Index: lang/english.txt
===================================================================
--- lang/english.txt	(revision 20007)
+++ lang/english.txt	(working copy)
@@ -3557,6 +3557,10 @@
 STR_ERROR_CAN_T_BUILD_TRAMWAY_HERE                              :{WHITE}Can't build tramway here...
 STR_ERROR_CAN_T_REMOVE_ROAD_FROM                                :{WHITE}Can't remove road from here...
 STR_ERROR_CAN_T_REMOVE_TRAMWAY_FROM                             :{WHITE}Can't remove tramway from here...
+############ Leave those lines in this order!!
+STR_ERROR_NO_ROAD_HERE                                          :{WHITE}... here isn't a road
+STR_ERROR_NO_TRAMWAY_HERE                                       :{WHITE}... here isn't a tramway
+############ End of leave-in-this-order
 
 # Waterway construction errors
 STR_ERROR_CAN_T_BUILD_CANALS                                    :{WHITE}Can't build canals here...