Index: src/lang/english.txt
===================================================================
--- src/lang/english.txt	(revision 12968)
+++ src/lang/english.txt	(working copy)
@@ -2714,6 +2714,7 @@
 STR_ORDER_CONDITIONAL_AGE                                       :Vehicle age (years)
 STR_ORDER_CONDITIONAL_REQUIRES_SERVICE                          :Requires service
 STR_ORDER_CONDITIONAL_UNCONDITIONALLY                           :Always
+STR_ORDER_CONDITIONAL_RANDOM                                    :Random chance (%)
 STR_ORDER_CONDITIONAL_COMPARATOR_EQUALS                         :is equal to
 STR_ORDER_CONDITIONAL_COMPARATOR_NOT_EQUALS                     :is not equal to
 STR_ORDER_CONDITIONAL_COMPARATOR_LESS_THAN                      :is less than
@@ -2726,6 +2727,7 @@
 STR_CONDITIONAL_UNCONDITIONAL                                   :Jump to order {COMMA}
 STR_CONDITIONAL_NUM                                             :Jump to order {COMMA} when {STRING} {STRING} {COMMA}
 STR_CONDITIONAL_TRUE_FALSE                                      :Jump to order {COMMA} when {STRING} {STRING}
+STR_CONDITIONAL_RANDOM                                          :Jump to order {COMMA} with a random chance of {COMMA}%
 
 STR_TIMETABLE_TRAVEL_NOT_TIMETABLED                             :Travel (not timetabled)
 STR_TIMETABLE_TRAVEL_FOR                                        :Travel for {STRING1}
Index: src/order_cmd.cpp
===================================================================
--- src/order_cmd.cpp	(revision 12968)
+++ src/order_cmd.cpp	(working copy)
@@ -968,6 +968,7 @@
 
 					case OCV_LOAD_PERCENTAGE:
 					case OCV_RELIABILITY:
+					case OCV_RANDOM:
 						if (order->GetConditionValue() > 100) order->SetConditionValue(100);
 						/* FALL THROUGH */
 					default:
@@ -1755,6 +1756,7 @@
 				case OCV_AGE:              skip_order = OrderConditionCompare(occ, v->age / 366,                      value); break;
 				case OCV_REQUIRES_SERVICE: skip_order = OrderConditionCompare(occ, v->NeedsServicing(),               value); break;
 				case OCV_UNCONDITIONALLY:  skip_order = true; break;
+				case OCV_RANDOM:           skip_order = Chance16(value, 100); break;
 				default: NOT_REACHED();
 			}
 			UpdateVehicleTimetable(v, true);
Index: src/order_gui.cpp
===================================================================
--- src/order_gui.cpp	(revision 12968)
+++ src/order_gui.cpp	(working copy)
@@ -193,6 +193,7 @@
 	STR_ORDER_CONDITIONAL_AGE,
 	STR_ORDER_CONDITIONAL_REQUIRES_SERVICE,
 	STR_ORDER_CONDITIONAL_UNCONDITIONALLY,
+	STR_ORDER_CONDITIONAL_RANDOM,
 	INVALID_STRING_ID,
 };
 
@@ -289,17 +290,24 @@
 
 		case OT_CONDITIONAL:
 			SetDParam(2, order->GetConditionSkipToOrder() + 1);
-			if (order->GetConditionVariable() == OCV_UNCONDITIONALLY) {
-				SetDParam(1, STR_CONDITIONAL_UNCONDITIONAL);
-			} else {
-				OrderConditionComparator occ = order->GetConditionComparator();
-				SetDParam(1, (occ == OCC_IS_TRUE || occ == OCC_IS_FALSE) ? STR_CONDITIONAL_TRUE_FALSE : STR_CONDITIONAL_NUM);
-				SetDParam(3, STR_ORDER_CONDITIONAL_LOAD_PERCENTAGE + order->GetConditionVariable());
-				SetDParam(4, STR_ORDER_CONDITIONAL_COMPARATOR_EQUALS + occ);
+			uint value = order->GetConditionValue();
+			switch (order->GetConditionVariable()) {
+				case OCV_UNCONDITIONALLY:
+					SetDParam(1, STR_CONDITIONAL_UNCONDITIONAL);
+					break;
+				case OCV_RANDOM:
+					SetDParam(1, STR_CONDITIONAL_RANDOM);
+					SetDParam(3, value);
+					break;
+				default:
+					OrderConditionComparator occ = order->GetConditionComparator();
+					SetDParam(1, (occ == OCC_IS_TRUE || occ == OCC_IS_FALSE) ? STR_CONDITIONAL_TRUE_FALSE : STR_CONDITIONAL_NUM);
+					SetDParam(3, STR_ORDER_CONDITIONAL_LOAD_PERCENTAGE + order->GetConditionVariable());
+					SetDParam(4, STR_ORDER_CONDITIONAL_COMPARATOR_EQUALS + occ);
 
-				uint value = order->GetConditionValue();
-				if (order->GetConditionVariable() == OCV_MAX_SPEED) value = ConvertSpeedToDisplaySpeed(value);
-				SetDParam(5, value);
+					if (order->GetConditionVariable() == OCV_MAX_SPEED) value = ConvertSpeedToDisplaySpeed(value);
+					SetDParam(5, value);
+					break;
 			}
 			break;
 
@@ -386,7 +394,7 @@
 				w->ShowWidget(ORDER_WIDGET_COND_VALUE);
 
 				OrderConditionVariable ocv = order->GetConditionVariable();
-				w->SetWidgetDisabledState(ORDER_WIDGET_COND_COMPARATOR, ocv == OCV_UNCONDITIONALLY);
+				w->SetWidgetDisabledState(ORDER_WIDGET_COND_COMPARATOR, ocv == OCV_UNCONDITIONALLY || ocv == OCV_RANDOM);
 				w->SetWidgetDisabledState(ORDER_WIDGET_COND_VALUE, ocv == OCV_REQUIRES_SERVICE || ocv == OCV_UNCONDITIONALLY);
 
 				uint value = order->GetConditionValue();
@@ -910,6 +918,7 @@
 
 					case OCV_RELIABILITY:
 					case OCV_LOAD_PERCENTAGE:
+					case OCV_RANDOM:
 						value = Clamp(value, 0, 100);
 
 					default:
Index: src/order_type.h
===================================================================
--- src/order_type.h	(revision 12968)
+++ src/order_type.h	(working copy)
@@ -96,6 +96,7 @@
 	OCV_AGE,              ///< Skip based on the age
 	OCV_REQUIRES_SERVICE, ///< Skip when the vehicle requires service
 	OCV_UNCONDITIONALLY,  ///< Always skip
+	OCV_RANDOM,           ///< Skip based on a random check
 	OCV_END
 };