--- a/src/aircraft.h	Tue Aug 28 01:09:41 2007 +0000
+++ b/src/aircraft.h	Tue Aug 28 06:46:33 2007 +0000
@@ -129,6 +129,7 @@
 	bool IsPrimaryVehicle() const { return IsNormalAircraft(this); }
 	int GetImage(Direction direction) const;
 	int GetDisplaySpeed() const { return this->cur_speed * 10 / 16; }
+	int GetDisplayMaxSpeed() const { return this->max_speed * 10 / 16; }
 	void Tick();
 };
 

--- a/src/aircraft_gui.cpp	Tue Aug 28 01:09:41 2007 +0000
+++ b/src/aircraft_gui.cpp	Tue Aug 28 06:46:33 2007 +0000
@@ -86,7 +86,7 @@
 
 		/* Draw max speed */
 		{
-			SetDParam(0, v->max_speed * 10 / 16);
+			SetDParam(0, v->GetDisplayMaxSpeed());
 			DrawString(2, 25, STR_A00E_MAX_SPEED, 0);
 		}
 

--- a/src/roadveh.h	Tue Aug 28 01:09:41 2007 +0000
+++ b/src/roadveh.h	Tue Aug 28 06:46:33 2007 +0000
@@ -82,6 +82,7 @@
 	bool HasFront() const { return true; }
 	int GetImage(Direction direction) const;
 	int GetDisplaySpeed() const { return this->cur_speed * 10 / 32; }
+	int GetDisplayMaxSpeed() const { return this->max_speed * 10 / 32; }
 	void Tick();
 };
 

--- a/src/roadveh_gui.cpp	Tue Aug 28 01:09:41 2007 +0000
+++ b/src/roadveh_gui.cpp	Tue Aug 28 06:46:33 2007 +0000
@@ -97,7 +97,7 @@
 
 		/* Draw max speed */
 		{
-			SetDParam(0, v->max_speed * 10 / 32);
+			SetDParam(0, v->GetDisplayMaxSpeed());
 			DrawString(2, 25, STR_900E_MAX_SPEED, 0);
 		}
 

--- a/src/ship.h	Tue Aug 28 01:09:41 2007 +0000
+++ b/src/ship.h	Tue Aug 28 06:46:33 2007 +0000
@@ -47,6 +47,7 @@
 	bool IsPrimaryVehicle() const { return true; }
 	int GetImage(Direction direction) const;
 	int GetDisplaySpeed() const { return this->cur_speed * 10 / 32; }
+	int GetDisplayMaxSpeed() const { return this->max_speed * 10 / 32; }
 	void Tick();
 };
 

--- a/src/ship_gui.cpp	Tue Aug 28 01:09:41 2007 +0000
+++ b/src/ship_gui.cpp	Tue Aug 28 06:46:33 2007 +0000
@@ -56,7 +56,7 @@
 
 		/* Draw max speed */
 		{
-			SetDParam(0, v->max_speed * 10 / 32);
+			SetDParam(0, v->GetDisplayMaxSpeed());
 			DrawString(2, 25, STR_9813_MAX_SPEED, 0);
 		}
 

--- a/src/train.h	Tue Aug 28 01:09:41 2007 +0000
+++ b/src/train.h	Tue Aug 28 06:46:33 2007 +0000
@@ -273,6 +273,7 @@
 	bool HasFront() const { return true; }
 	int GetImage(Direction direction) const;
 	int GetDisplaySpeed() const { return this->cur_speed * 10 / 16; }
+	int GetDisplayMaxSpeed() const { return this->u.rail.cached_max_speed * 10 / 16; }
 	void Tick();
 };
 

--- a/src/train_gui.cpp	Tue Aug 28 01:09:41 2007 +0000
+++ b/src/train_gui.cpp	Tue Aug 28 06:46:33 2007 +0000
@@ -421,7 +421,7 @@
 	SetDParam(3, GetTrainRunningCost(v) >> 8);
 	DrawString(x, 15, STR_885D_AGE_RUNNING_COST_YR, 0);
 
-	SetDParam(2, v->u.rail.cached_max_speed * 10 / 16);
+	SetDParam(2, v->GetDisplayMaxSpeed());
 	SetDParam(1, v->u.rail.cached_power);
 	SetDParam(0, v->u.rail.cached_weight);
 	SetDParam(3, v->u.rail.cached_max_te / 1000);

--- a/src/vehicle.h	Tue Aug 28 01:09:41 2007 +0000
+++ b/src/vehicle.h	Tue Aug 28 06:46:33 2007 +0000
@@ -421,6 +421,12 @@
 	virtual int GetDisplaySpeed() const { return 0; }
 
 	/**
+	 * Gets the maximum speed in mph that can be sent into SetDParam for string processing.
+	 * @return the vehicle's maximum speed
+	 */
+	virtual int GetDisplayMaxSpeed() const { return 0; }
+
+	/**
 	 * Calls the tick handler of the vehicle
 	 */
 	virtual void Tick() {};