--- a/src/aircraft.h
+++ b/src/aircraft.h
@@ -78,7 +78,13 @@
 	int GetSpeedOldUnits() const   { return this->vcache.cached_max_speed * 10 / 128; }
 	int GetCurrentMaxSpeed() const { return this->GetSpeedOldUnits(); }
 	Money GetRunningCost() const;
-	bool IsInDepot() const { return (this->vehstatus & VS_HIDDEN) != 0 && IsHangarTile(this->tile); }
+
+	bool IsInDepot() const
+	{
+		assert(this->IsPrimaryVehicle());
+		return (this->vehstatus & VS_HIDDEN) != 0 && IsHangarTile(this->tile);
+	}
+
 	bool Tick();
 	void OnNewDay();
 	uint Crash(bool flooded = false);

--- a/src/aircraft_cmd.cpp
+++ b/src/aircraft_cmd.cpp
@@ -365,7 +365,7 @@
 static void CheckIfAircraftNeedsService(Aircraft *v)
 {
 	if (Company::Get(v->owner)->settings.vehicle.servint_aircraft == 0 || !v->NeedsAutomaticServicing()) return;
-	if (v->IsInDepot()) {
+	if (v->IsChainInDepot()) {
 		VehicleServiceInDepot(v);
 		return;
 	}

--- a/src/autoreplace_cmd.cpp
+++ b/src/autoreplace_cmd.cpp
@@ -665,7 +665,7 @@
 	CommandCost ret = CheckOwnership(v->owner);
 	if (ret.Failed()) return ret;
 
-	if (!v->IsInDepot()) return CMD_ERROR;
+	if (!v->IsChainInDepot()) return CMD_ERROR;
 	if (v->vehstatus & VS_CRASHED) return CMD_ERROR;
 
 	bool free_wagon = false;

--- a/src/ground_vehicle.cpp
+++ b/src/ground_vehicle.cpp
@@ -12,6 +12,7 @@
 #include "stdafx.h"
 #include "train.h"
 #include "roadveh.h"
+#include "depot_map.h"
 
 /**
  * Recalculates the cached total power of a vehicle. Should be called when the consist is changed.
@@ -164,6 +165,27 @@
 	}
 }
 
+/**
+ * Check whether the whole vehicle chain is in the depot.
+ * @return true if and only if the whole chain is in the depot.
+ */
+template <class T, VehicleType Type>
+bool GroundVehicle<T, Type>::IsChainInDepot() const
+{
+	const T *v = this->First();
+	/* Is the front engine stationary in the depot? */
+	assert_compile((int)TRANSPORT_RAIL == (int)VEH_TRAIN);
+	assert_compile((int)TRANSPORT_ROAD == (int)VEH_ROAD);
+	if (!IsDepotTypeTile(v->tile, (TransportType)Type) || v->cur_speed != 0) return false;
+
+	/* Check whether the rest is also already trying to enter the depot. */
+	for (; v != NULL; v = v->Next()) {
+		if (!v->T::IsInDepot() || v->tile != this->tile) return false;
+	}
+
+	return true;
+}
+
 /* Instantiation for Train */
 template struct GroundVehicle<Train, VEH_TRAIN>;
 /* Instantiation for RoadVehicle */

--- a/src/ground_vehicle.hpp
+++ b/src/ground_vehicle.hpp
@@ -92,6 +92,7 @@
 	void PowerChanged();
 	void CargoChanged();
 	int GetAcceleration() const;
+	bool IsChainInDepot() const;
 
 	/**
 	 * Common code executed for crashed ground vehicles

--- a/src/roadveh.h
+++ b/src/roadveh.h
@@ -113,7 +113,6 @@
 	Money GetRunningCost() const;
 	int GetDisplayImageWidth(Point *offset = NULL) const;
 	bool IsInDepot() const { return this->state == RVSB_IN_DEPOT; }
-	bool IsStoppedInDepot() const;
 	bool Tick();
 	void OnNewDay();
 	uint Crash(bool flooded = false);

--- a/src/roadveh_cmd.cpp
+++ b/src/roadveh_cmd.cpp
@@ -306,19 +306,6 @@
 	return CommandCost();
 }
 
-bool RoadVehicle::IsStoppedInDepot() const
-{
-	TileIndex tile = this->tile;
-
-	if (!IsRoadDepotTile(tile)) return false;
-	if (this->IsFrontEngine() && !(this->vehstatus & VS_STOPPED)) return false;
-
-	for (const RoadVehicle *v = this; v != NULL; v = v->Next()) {
-		if (v->state != RVSB_IN_DEPOT || v->tile != tile) return false;
-	}
-	return true;
-}
-
 static FindDepotData FindClosestRoadDepot(const RoadVehicle *v, int max_distance)
 {
 	if (IsRoadDepotTile(v->tile)) return FindDepotData(v->tile, 0);
@@ -1582,7 +1569,7 @@
 {
 	/* If we already got a slot at a stop, use that FIRST, and go to a depot later */
 	if (Company::Get(v->owner)->settings.vehicle.servint_roadveh == 0 || !v->NeedsAutomaticServicing()) return;
-	if (v->IsInDepot()) {
+	if (v->IsChainInDepot()) {
 		VehicleServiceInDepot(v);
 		return;
 	}

--- a/src/script/api/script_vehicle.cpp
+++ b/src/script/api/script_vehicle.cpp
@@ -182,7 +182,7 @@
 /* static */ bool ScriptVehicle::IsInDepot(VehicleID vehicle_id)
 {
 	if (!IsValidVehicle(vehicle_id)) return false;
-	return ::Vehicle::Get(vehicle_id)->IsInDepot();
+	return ::Vehicle::Get(vehicle_id)->IsChainInDepot();
 }
 
 /* static */ bool ScriptVehicle::IsStoppedInDepot(VehicleID vehicle_id)

--- a/src/ship_cmd.cpp
+++ b/src/ship_cmd.cpp
@@ -142,7 +142,7 @@
 static void CheckIfShipNeedsService(Vehicle *v)
 {
 	if (Company::Get(v->owner)->settings.vehicle.servint_ships == 0 || !v->NeedsAutomaticServicing()) return;
-	if (v->IsInDepot()) {
+	if (v->IsChainInDepot()) {
 		VehicleServiceInDepot(v);
 		return;
 	}
@@ -298,7 +298,7 @@
 
 static bool CheckShipLeaveDepot(Ship *v)
 {
-	if (!v->IsInDepot()) return false;
+	if (!v->IsChainInDepot()) return false;
 
 	/* We are leaving a depot, but have to go to the exact same one; re-enter */
 	if (v->current_order.IsType(OT_GOTO_DEPOT) &&

--- a/src/train.h
+++ b/src/train.h
@@ -101,8 +101,7 @@
 	int GetDisplayMaxSpeed() const { return this->vcache.cached_max_speed; }
 	Money GetRunningCost() const;
 	int GetDisplayImageWidth(Point *offset = NULL) const;
-	bool IsInDepot() const;
-	bool IsStoppedInDepot() const;
+	bool IsInDepot() const { return this->track == TRACK_BIT_DEPOT; }
 	bool Tick();
 	void OnNewDay();
 	uint Crash(bool flooded = false);

--- a/src/train_cmd.cpp
+++ b/src/train_cmd.cpp
@@ -732,34 +732,6 @@
 	return CommandCost();
 }
 
-/**
- * Is the whole consist the in a depot?
- * @return \c true iff all vehicles of the train are in a depot.
- */
-bool Train::IsInDepot() const
-{
-	/* Is the front engine stationary in the depot? */
-	if (!IsRailDepotTile(this->tile) || this->cur_speed != 0) return false;
-
-	/* Check whether the rest is also already trying to enter the depot. */
-	for (const Train *v = this; v != NULL; v = v->Next()) {
-		if (v->track != TRACK_BIT_DEPOT || v->tile != this->tile) return false;
-	}
-
-	return true;
-}
-
-/**
- * Is the train stopped in a depot?
- * @return True if the train is stopped in a depot, else false.
- */
-bool Train::IsStoppedInDepot() const
-{
-	/* Are we stopped? Of course wagons don't really care... */
-	if (this->IsFrontEngine() && !(this->vehstatus & VS_STOPPED)) return false;
-	return this->IsInDepot();
-}
-
 static Train *FindGoodVehiclePos(const Train *src)
 {
 	EngineID eng = src->engine_type;
@@ -1946,7 +1918,7 @@
 		 * to proceed to the next signal. In the other cases we
 		 * would like to pass the signal at danger and run till the
 		 * next signal we encounter. */
-		t->force_proceed = t->force_proceed == TFP_SIGNAL ? TFP_NONE : HasBit(t->flags, VRF_TRAIN_STUCK) || t->IsInDepot() ? TFP_STUCK : TFP_SIGNAL;
+		t->force_proceed = t->force_proceed == TFP_SIGNAL ? TFP_NONE : HasBit(t->flags, VRF_TRAIN_STUCK) || t->IsChainInDepot() ? TFP_STUCK : TFP_SIGNAL;
 		SetWindowDirty(WC_VEHICLE_VIEW, t->index);
 	}
 
@@ -3897,7 +3869,7 @@
 static void CheckIfTrainNeedsService(Train *v)
 {
 	if (Company::Get(v->owner)->settings.vehicle.servint_trains == 0 || !v->NeedsAutomaticServicing()) return;
-	if (v->IsInDepot()) {
+	if (v->IsChainInDepot()) {
 		VehicleServiceInDepot(v);
 		return;
 	}

--- a/src/vehicle_base.h
+++ b/src/vehicle_base.h
@@ -417,10 +417,22 @@
 	virtual bool IsInDepot() const { return false; }
 
 	/**
+	 * Check whether the whole vehicle chain is in the depot.
+	 * @return true if and only if the whole chain is in the depot.
+	 */
+	virtual bool IsChainInDepot() const { return this->IsInDepot(); }
+
+	/**
 	 * Check whether the vehicle is in the depot *and* stopped.
 	 * @return true if and only if the vehicle is in the depot and stopped.
 	 */
-	virtual bool IsStoppedInDepot() const { return this->IsInDepot() && (this->vehstatus & VS_STOPPED) != 0; }
+	bool IsStoppedInDepot() const
+	{
+		assert(this == this->First());
+		/* Free wagons have no VS_STOPPED state */
+		if (this->IsPrimaryVehicle() && !(this->vehstatus & VS_STOPPED)) return false;
+		return this->IsChainInDepot();
+	}
 
 	/**
 	 * Calls the tick handler of the vehicle

--- a/src/vehicle_cmd.cpp
+++ b/src/vehicle_cmd.cpp
@@ -601,13 +601,7 @@
 
 		if (!!(v->vehstatus & VS_STOPPED) != do_start) continue;
 
-		if (!vehicle_list_window) {
-			if (vli.vtype == VEH_TRAIN) {
-				if (!Train::From(v)->IsInDepot()) continue;
-			} else {
-				if (!(v->vehstatus & VS_HIDDEN)) continue;
-			}
-		}
+		if (!vehicle_list_window && !v->IsChainInDepot()) continue;
 
 		/* Just try and don't care if some vehicle's can't be stopped. */
 		DoCommand(tile, v->index, 0, flags, CMD_START_STOP_VEHICLE);
@@ -679,7 +673,7 @@
 		const Vehicle *v = list[i];
 
 		/* Ensure that the vehicle completely in the depot */
-		if (!v->IsInDepot()) continue;
+		if (!v->IsChainInDepot()) continue;
 
 		CommandCost ret = DoCommand(0, v->index, 0, flags, CMD_AUTOREPLACE_VEHICLE);
 

--- a/src/vehicle_gui.cpp
+++ b/src/vehicle_gui.cpp
@@ -1292,7 +1292,7 @@
 
 		if (show_orderlist) DrawSmallOrderList(v, orderlist_left, orderlist_right, y, v->cur_real_order_index);
 
-		if (v->IsInDepot()) {
+		if (v->IsChainInDepot()) {
 			str = STR_BLUE_COMMA;
 		} else {
 			str = (v->age > v->max_age - DAYS_IN_LEAP_YEAR) ? STR_RED_COMMA : STR_BLACK_COMMA;