--- a/src/ground_vehicle.hpp
+++ b/src/ground_vehicle.hpp
@@ -13,7 +13,9 @@
 #define GROUND_VEHICLE_HPP
 
 #include "vehicle_base.h"
+#include "vehicle_gui.h"
 #include "landscape.h"
+#include "window_func.h"
 
 /** What is the status of our acceleration? */
 enum AccelStatus {
@@ -41,6 +43,9 @@
 	uint16 cached_total_length;     ///< Length of the whole vehicle (valid only for the first engine).
 	EngineID first_engine;          ///< Cached EngineID of the front vehicle. INVALID_ENGINE for the front vehicle itself.
 	uint8 cached_veh_length;        ///< Length of this vehicle in units of 1/8 of normal length. It is cached because this can be set by a callback.
+
+	/* Cached UI information. */
+	uint16 last_speed;              ///< The last speed we did display, so we only have to redraw when this changes.
 };
 
 /** Ground vehicle flags. */
@@ -357,6 +362,21 @@
 	 * @return True if the engine has an articulated part.
 	 */
 	FORCEINLINE bool HasArticulatedPart() const { return this->Next() != NULL && this->Next()->IsArticulatedPart(); }
+
+	/**
+	 * Update the GUI variant of the current speed of the vehicle.
+	 * Also mark the widget dirty when that is needed, i.e. when
+	 * the speed of this vehicle has changed.
+	 */
+	FORCEINLINE void SetLastSpeed()
+	{
+		if (this->cur_speed != this->gcache.last_speed) {
+			if (_settings_client.gui.vehicle_speed || (this->gcache.last_speed == 0) != (this->cur_speed == 0)) {
+				SetWindowWidgetDirty(WC_VEHICLE_VIEW, this->index, VVW_WIDGET_START_STOP_VEH);
+			}
+			this->gcache.last_speed = this->cur_speed;
+		}
+	}
 };
 
 #endif /* GROUND_VEHICLE_HPP */

--- a/src/saveload/vehicle_sl.cpp
+++ b/src/saveload/vehicle_sl.cpp
@@ -336,7 +336,7 @@
 			case VEH_TRAIN: {
 				Train *t = Train::From(v);
 				if (t->IsFrontEngine() || t->IsFreeWagon()) {
-					t->tcache.last_speed = t->cur_speed; // update displayed train speed
+					t->gcache.last_speed = t->cur_speed; // update displayed train speed
 					t->ConsistChanged(false);
 				}
 				break;

--- a/src/train.h
+++ b/src/train.h
@@ -65,8 +65,6 @@
 	/* Cached wagon override spritegroup */
 	const struct SpriteGroup *cached_override;
 
-	uint16 last_speed; // NOSAVE: only used in UI
-
 	/* cached values, recalculated on load and each time a vehicle is added to/removed from the consist. */
 	bool cached_tilt;           ///< train can tilt; feature provides a bonus in curves
 
@@ -110,7 +108,7 @@
 	void PlayLeaveStationSound() const;
 	bool IsPrimaryVehicle() const { return this->IsFrontEngine(); }
 	SpriteID GetImage(Direction direction) const;
-	int GetDisplaySpeed() const { return this->tcache.last_speed; }
+	int GetDisplaySpeed() const { return this->gcache.last_speed; }
 	int GetDisplayMaxSpeed() const { return this->vcache.cached_max_speed; }
 	Money GetRunningCost() const;
 	int GetDisplayImageWidth(Point *offset = NULL) const;

--- a/src/train_cmd.cpp
+++ b/src/train_cmd.cpp
@@ -1395,17 +1395,6 @@
 	this->z_extent      = 6;
 }
 
-static inline void SetLastSpeed(Train *v, int spd)
-{
-	int old = v->tcache.last_speed;
-	if (spd != old) {
-		v->tcache.last_speed = spd;
-		if (_settings_client.gui.vehicle_speed || (old == 0) != (spd == 0)) {
-			SetWindowWidgetDirty(WC_VEHICLE_VIEW, v->index, VVW_WIDGET_START_STOP_VEH);
-		}
-	}
-}
-
 /** Mark a train as stuck and stop it if it isn't stopped right now. */
 static void MarkTrainAsStuck(Train *v)
 {
@@ -1418,7 +1407,7 @@
 		/* Stop train */
 		v->cur_speed = 0;
 		v->subspeed = 0;
-		SetLastSpeed(v, 0);
+		v->SetLastSpeed();
 
 		SetWindowWidgetDirty(WC_VEHICLE_VIEW, v->index, VVW_WIDGET_START_STOP_VEH);
 	}
@@ -1843,7 +1832,7 @@
 				ToggleBit(v->flags, VRF_REVERSING);
 			} else {
 				v->cur_speed = 0;
-				SetLastSpeed(v, 0);
+				v->SetLastSpeed();
 				HideFillingPercent(&v->fill_percent_te_id);
 				ReverseTrainDirection(v);
 			}
@@ -3659,7 +3648,7 @@
 	int adv_spd = v->GetAdvanceDistance();
 	if (j < adv_spd) {
 		/* if the vehicle has speed 0, update the last_speed field. */
-		if (v->cur_speed == 0) SetLastSpeed(v, v->cur_speed);
+		if (v->cur_speed == 0) v->SetLastSpeed();
 	} else {
 		TrainCheckIfLineEnds(v);
 		/* Loop until the train has finished moving. */
@@ -3683,7 +3672,7 @@
 				ProcessOrders(v);
 			}
 		}
-		SetLastSpeed(v, v->cur_speed);
+		v->SetLastSpeed();
 	}
 
 	for (Train *u = v; u != NULL; u = u->Next()) {