diff --git a/src/depot_gui.cpp b/src/depot_gui.cpp
--- a/src/depot_gui.cpp
+++ b/src/depot_gui.cpp
@@ -305,7 +305,7 @@ struct DepotWindow : Window {
 		}
 
 		uint diff_x, diff_y;
-		if (v->type == VEH_TRAIN || v->type == VEH_ROAD) {
+		if (v->IsGroundVehicle()) {
 			/* Arrange unitnumber and flag horizontally */
 			diff_x = this->flag_width + WD_FRAMERECT_LEFT;
 			diff_y = (this->resize.step_height - this->flag_height) / 2 - 2;
diff --git a/src/disaster_cmd.cpp b/src/disaster_cmd.cpp
--- a/src/disaster_cmd.cpp
+++ b/src/disaster_cmd.cpp
@@ -506,7 +506,7 @@ static bool DisasterTick_Big_Ufo(Disaste
 
 		Vehicle *target;
 		FOR_ALL_VEHICLES(target) {
-			if (target->type == VEH_TRAIN || target->type == VEH_ROAD) {
+			if (target->IsGroundVehicle()) {
 				if (Delta(target->x_pos, v->x_pos) + Delta(target->y_pos, v->y_pos) <= 12 * (int)TILE_SIZE) {
 					target->breakdown_ctr = 5;
 					target->breakdown_delay = 0xF0;
diff --git a/src/newgrf_engine.cpp b/src/newgrf_engine.cpp
--- a/src/newgrf_engine.cpp
+++ b/src/newgrf_engine.cpp
@@ -611,7 +611,7 @@ static uint32 VehicleGetVariable(const R
 			 * B - current wagon to next wagon, 0 if wagon is last
 			 * T - previous wagon to next wagon, 0 in an S-bend
 			 */
-			if (v->type != VEH_TRAIN && v->type != VEH_ROAD) return 0;
+			if (!v->IsGroundVehicle()) return 0;
 
 			const Vehicle *u_p = v->Previous();
 			const Vehicle *u_n = v->Next();
diff --git a/src/order_cmd.cpp b/src/order_cmd.cpp
--- a/src/order_cmd.cpp
+++ b/src/order_cmd.cpp
@@ -485,8 +485,8 @@ CommandCost CmdInsertOrder(TileIndex til
 				if (!CanVehicleUseStation(u, st)) return_cmd_error(STR_ERROR_CAN_T_ADD_ORDER_SHARED);
 			}
 
-			/* Non stop not allowed for non-trains. */
-			if (new_order.GetNonStopType() != ONSF_STOP_EVERYWHERE && v->type != VEH_TRAIN && v->type != VEH_ROAD) return CMD_ERROR;
+			/* Non stop only allowed for ground vehicles. */
+			if (new_order.GetNonStopType() != ONSF_STOP_EVERYWHERE && !v->IsGroundVehicle()) return CMD_ERROR;
 
 			/* No load and no unload are mutual exclusive. */
 			if ((new_order.GetLoadType() & OLFB_NO_LOAD) && (new_order.GetUnloadType() & OUFB_NO_UNLOAD)) return CMD_ERROR;
@@ -556,7 +556,7 @@ CommandCost CmdInsertOrder(TileIndex til
 				}
 			}
 
-			if (new_order.GetNonStopType() != ONSF_STOP_EVERYWHERE && v->type != VEH_TRAIN && v->type != VEH_ROAD) return CMD_ERROR;
+			if (new_order.GetNonStopType() != ONSF_STOP_EVERYWHERE && !v->IsGroundVehicle()) return CMD_ERROR;
 			if (new_order.GetDepotOrderType() & ~(ODTFB_PART_OF_ORDERS | ((new_order.GetDepotOrderType() & ODTFB_PART_OF_ORDERS) != 0 ? ODTFB_SERVICE : 0))) return CMD_ERROR;
 			if (new_order.GetDepotActionType() & ~(ODATFB_HALT | ODATFB_NEAREST_DEPOT)) return CMD_ERROR;
 			if ((new_order.GetDepotOrderType() & ODTFB_SERVICE) && (new_order.GetDepotActionType() & ODATFB_HALT)) return CMD_ERROR;
@@ -973,7 +973,7 @@ CommandCost CmdModifyOrder(TileIndex til
 		default: NOT_REACHED();
 
 		case MOF_NON_STOP:
-			if (v->type != VEH_TRAIN && v->type != VEH_ROAD) return CMD_ERROR;
+			if (!v->IsGroundVehicle()) return CMD_ERROR;
 			if (data >= ONSF_END) return CMD_ERROR;
 			if (data == order->GetNonStopType()) return CMD_ERROR;
 			break;
diff --git a/src/order_gui.cpp b/src/order_gui.cpp
--- a/src/order_gui.cpp
+++ b/src/order_gui.cpp
@@ -216,7 +216,7 @@ void DrawOrderString(const Vehicle *v, c
 			OrderUnloadFlags unload = order->GetUnloadType();
 
 			SetDParam(0, STR_ORDER_GO_TO_STATION);
-			SetDParam(1, STR_ORDER_GO_TO + ((v->type == VEH_TRAIN || v->type == VEH_ROAD) ? order->GetNonStopType() : 0));
+			SetDParam(1, STR_ORDER_GO_TO + (v->IsGroundVehicle() ? order->GetNonStopType() : 0));
 			SetDParam(2, order->GetDestination());
 
 			if (timetable) {
@@ -382,7 +382,7 @@ static Order GetOrderCmdFromTile(const V
 			if (st->facilities & facil) {
 				order.MakeGoToStation(st_index);
 				if (_ctrl_pressed) order.SetLoadType(OLF_FULL_LOAD_ANY);
-				if (_settings_client.gui.new_nonstop && (v->type == VEH_TRAIN || v->type == VEH_ROAD)) order.SetNonStopType(ONSF_NO_STOP_AT_INTERMEDIATE_STATIONS);
+				if (_settings_client.gui.new_nonstop && v->IsGroundVehicle()) order.SetNonStopType(ONSF_NO_STOP_AT_INTERMEDIATE_STATIONS);
 				order.SetStopLocation(v->type == VEH_TRAIN ? (OrderStopLocation)(_settings_client.gui.stop_location) : OSL_PLATFORM_FAR_END);
 				return order;
 			}
@@ -572,7 +572,7 @@ private:
 		order.next = NULL;
 		order.index = 0;
 		order.MakeGoToDepot(0, ODTFB_PART_OF_ORDERS,
-				_settings_client.gui.new_nonstop && (this->vehicle->type == VEH_TRAIN || this->vehicle->type == VEH_ROAD) ? ONSF_NO_STOP_AT_INTERMEDIATE_STATIONS : ONSF_STOP_EVERYWHERE);
+				_settings_client.gui.new_nonstop && this->vehicle->IsGroundVehicle() ? ONSF_NO_STOP_AT_INTERMEDIATE_STATIONS : ONSF_STOP_EVERYWHERE);
 		order.SetDepotActionType(ODATFB_NEAREST_DEPOT);
 
 		DoCommandP(this->vehicle->tile, this->vehicle->index + (this->OrderGetSel() << 20), order.Pack(), CMD_INSERT_ORDER | CMD_MSG(STR_ERROR_CAN_T_INSERT_NEW_ORDER));
@@ -647,7 +647,7 @@ private:
 	 */
 	void OrderClick_Nonstop(int non_stop)
 	{
-		if (this->vehicle->type != VEH_TRAIN && this->vehicle->type != VEH_ROAD) return;
+		if (!this->vehicle->IsGroundVehicle()) return;
 
 		VehicleOrderID sel_ord = this->OrderGetSel();
 		const Order *order = this->vehicle->GetOrder(sel_ord);
@@ -1605,6 +1605,6 @@ void ShowOrdersWindow(const Vehicle *v)
 	if (v->owner != _local_company) {
 		new OrdersWindow(&_other_orders_desc, v);
 	} else {
-		new OrdersWindow((v->type == VEH_TRAIN || v->type == VEH_ROAD) ? &_orders_train_desc : &_orders_desc, v);
+		new OrdersWindow(v->IsGroundVehicle() ? &_orders_train_desc : &_orders_desc, v);
 	}
 }
diff --git a/src/pathfinder/npf/npf.cpp b/src/pathfinder/npf/npf.cpp
--- a/src/pathfinder/npf/npf.cpp
+++ b/src/pathfinder/npf/npf.cpp
@@ -1101,7 +1101,7 @@ static void NPFFillWithOrderData(NPFFind
 	 * So only for train orders to stations we fill fstd->station_index, for all
 	 * others only dest_coords */
 	if (v->type != VEH_SHIP && (v->current_order.IsType(OT_GOTO_STATION) || v->current_order.IsType(OT_GOTO_WAYPOINT))) {
-		assert(v->type == VEH_TRAIN || v->type == VEH_ROAD);
+		assert(v->IsGroundVehicle());
 		fstd->station_index = v->current_order.GetDestination();
 		fstd->station_type = (v->type == VEH_TRAIN) ? (v->current_order.IsType(OT_GOTO_STATION) ? STATION_RAIL : STATION_WAYPOINT) : (RoadVehicle::From(v)->IsBus() ? STATION_BUS : STATION_TRUCK);
 		fstd->not_articulated = v->type == VEH_ROAD && !RoadVehicle::From(v)->HasArticulatedPart();
diff --git a/src/saveload/afterload.cpp b/src/saveload/afterload.cpp
--- a/src/saveload/afterload.cpp
+++ b/src/saveload/afterload.cpp
@@ -1025,7 +1025,7 @@ bool AfterLoadGame()
 		}
 
 		FOR_ALL_VEHICLES(v) {
-			if (v->type != VEH_TRAIN && v->type != VEH_ROAD) continue;
+			if (!v->IsGroundVehicle()) continue;
 			if (IsBridgeTile(v->tile)) {
 				DiagDirection dir = GetTunnelBridgeDirection(v->tile);
 
diff --git a/src/vehicle_base.h b/src/vehicle_base.h
--- a/src/vehicle_base.h
+++ b/src/vehicle_base.h
@@ -360,6 +360,15 @@ public:
 	}
 
 	/**
+	 * Check if the vehicle is a ground vehicle.
+	 * @return True iff the vehicle is a train or a road vehicle.
+	 */
+	FORCEINLINE bool IsGroundVehicle() const
+	{
+		return this->type == VEH_TRAIN || this->type == VEH_ROAD;
+	}
+
+	/**
 	 * Gets the speed in km-ish/h that can be sent into SetDParam for string processing.
 	 * @return the vehicle's speed
 	 */
diff --git a/src/vehicle_gui.cpp b/src/vehicle_gui.cpp
--- a/src/vehicle_gui.cpp
+++ b/src/vehicle_gui.cpp
@@ -435,7 +435,7 @@ struct RefitWindow : public Window {
 				}
 				current_index++;
 			}
-		} while ((v->type == VEH_TRAIN || v->type == VEH_ROAD) && (v = v->Next()) != NULL);
+		} while (v->IsGroundVehicle() && (v = v->Next()) != NULL);
 
 		int scroll_size = 0;
 		for (uint i = 0; i < NUM_CARGO; i++) {
@@ -2033,7 +2033,7 @@ static bool IsVehicleRefitable(const Veh
 
 	do {
 		if (IsEngineRefittable(v->engine_type)) return true;
-	} while ((v->type == VEH_TRAIN || v->type == VEH_ROAD) && (v = v->Next()) != NULL);
+	} while (v->IsGroundVehicle() && (v = v->Next()) != NULL);
 
 	return false;
 }
@@ -2311,7 +2311,7 @@ public:
 										CcCloneVehicle);
 				break;
 			case VVW_WIDGET_TURN_AROUND: // turn around
-				assert(v->type == VEH_TRAIN || v->type == VEH_ROAD);
+				assert(v->IsGroundVehicle());
 				DoCommandP(v->tile, v->index, 0,
 										_vehicle_command_translation_table[VCT_CMD_TURN_AROUND][v->type]);
 				break;
@@ -2345,7 +2345,7 @@ public:
 			this->SetWidgetDirty(VVW_WIDGET_SELECT_DEPOT_CLONE);
 		}
 		/* The same system applies to widget VVW_WIDGET_REFIT_VEH and VVW_WIDGET_TURN_AROUND.*/
-		if (v->type == VEH_ROAD || v->type == VEH_TRAIN) {
+		if (v->IsGroundVehicle()) {
 			PlaneSelections plane = veh_stopped ? SEL_RT_REFIT : SEL_RT_TURN_AROUND;
 			NWidgetStacked *nwi = this->GetWidget<NWidgetStacked>(VVW_WIDGET_SELECT_REFIT_TURN);
 			if (nwi->shown_plane + SEL_RT_BASEPLANE != plane) {