Index: src/lang/english.txt
===================================================================
--- src/lang/english.txt	(revision 11046)
+++ src/lang/english.txt	(working copy)
@@ -3374,3 +3374,9 @@
 STR_PROSPECT_NEW_INDUSTRY                                       :{BLACK}Prospect
 STR_BUILD_NEW_INDUSTRY                                          :{BLACK}Build
 STR_INDUSTRY_SELECTION_HINT                                     :{BLACK}Choose the appropriate industry from this list
+
+#### Vehicle speeds tab
+STR_WAGON_SPEEDS                                                :{BLACK}Speeds
+STR_WAGON_SPEEDS_TOOLTIP                                        :{BLACK}Show engine and wagons speeds
+STR_WAGON_SPEEDS_VELOCITY                                       :{LTBLUE}{VELOCITY}
+STR_WAGON_SPEEDS_VELOCITY_NO_LIMIT                              :{LTBLUE}No limit
Index: src/train_gui.cpp
===================================================================
--- src/train_gui.cpp	(revision 11046)
+++ src/train_gui.cpp	(working copy)
@@ -19,6 +19,17 @@
 #include "train.h"
 #include "newgrf_engine.h"
 
+/* Train List Widgets */
+enum {
+	TLW_NAME = 2,
+	TLW_SERVICE_SCROLL_INC = 6,
+	TLW_SERVICE_SCROLL_DEC = 7,
+	TLW_CARGO = 9,
+	TLW_INFORMATION = 10,
+	TLW_CAPACITY = 11,
+	TLW_TOTAL_CARGO = 12,
+	TLW_SPEEDS = 14,
+};
 void CcBuildWagon(bool success, TileIndex tile, uint32 p1, uint32 p2)
 {
 	Vehicle *v, *found;
@@ -152,7 +163,38 @@
 	}
 }
 
+/**
+ * Vehicle speeds detail.
+ * It displays the maximum speed of the vehicle according the GRF settings and patch options
+ * @param *v Vehicle to display
+ * @param x Coordinate (horizontal) of the string to display
+ * @param y Coordinate (vertical) of the string to display
+ * @author Magicbuzz
+ */
+static void TrainDetailsSpeedsTab(const Vehicle *v, int x, int y)
+{
+	/** Vehicle max speed is found from the general vehicle information, not the vehicle itself */
+	const RailVehicleInfo *rvi = RailVehInfo(v->engine_type);
 
+	/**
+	 * Wagons can have max speed only when the wagon_speed_limits is set and not using wagon override to reflect the
+	 * value the vehicle actually uses.
+	 * @see train_cmd.cpp TrainConsistChanged(Vehicle* v)
+	 */
+	if ((rvi->railveh_type != RAILVEH_WAGON || _patches.wagon_speed_limits) && !UsesWagonOverride(v)) {
+		uint16 speed = GetVehicleProperty(v, 0x09, rvi->max_speed) * 10 / 16; ///< GRF speeds are in MPH while OTTD uses KMPH
+		if (speed > 0) {
+			/** Max speed is set, so we display it */
+			SetDParam(0, speed);
+			DrawStringRightAligned(x, y, STR_WAGON_SPEEDS_VELOCITY, 0);
+		} else {
+			/** Max speed is not set, so we display "no limit" */
+			DrawStringRightAligned(x, y, STR_WAGON_SPEEDS_VELOCITY_NO_LIMIT, 0);
+			//DrawString(x, y, STR_WAGON_SPEEDS_VELOCITY_NO_LIMIT, 0);
+		}
+	}
+}
+
 static void DrawTrainDetailsWindow(Window *w)
 {
 	byte det_tab = WP(w, traindetails_d).tab;
@@ -167,7 +209,7 @@
 
 	num = 0;
 	u = v = GetVehicle(w->window_number);
-	if (det_tab == 3) { // Total cargo tab
+	if (det_tab == TLW_TOTAL_CARGO) {
 		for (CargoID i = 0; i < lengthof(act_cargo); i++) {
 			act_cargo[i] = 0;
 			max_cargo[i] = 0;
@@ -193,12 +235,12 @@
 
 	SetVScrollCount(w, num);
 
-	DisableWindowWidget(w, det_tab + 9);
-	SetWindowWidgetDisabledState(w, 2, v->owner != _local_player);
+	DisableWindowWidget(w, det_tab);
+	SetWindowWidgetDisabledState(w, TLW_NAME, v->owner != _local_player);
 
 	/* disable service-scroller when interval is set to disabled */
-	SetWindowWidgetDisabledState(w, 6, !_patches.servint_trains);
-	SetWindowWidgetDisabledState(w, 7, !_patches.servint_trains);
+	SetWindowWidgetDisabledState(w, TLW_SERVICE_SCROLL_INC, !_patches.servint_trains);
+	SetWindowWidgetDisabledState(w, TLW_SERVICE_SCROLL_DEC, !_patches.servint_trains);
 
 	SetDParam(0, v->index);
 	DrawWindowWidgets(w);
@@ -235,8 +277,8 @@
 	y = 57;
 	sel = w->vscroll.pos;
 
-	/* draw the first 3 details tabs */
-	if (det_tab != 3) {
+	/* draw the first 4 details tabs */
+	if (det_tab != TLW_TOTAL_CARGO) {
 		x = 1;
 		for (;;) {
 			if (--sel < 0 && sel >= -w->vscroll.cap) {
@@ -256,14 +298,15 @@
 				py = y + 2;
 				switch (det_tab) {
 					default: NOT_REACHED();
-					case 0: TrainDetailsCargoTab(   v, px, py); break;
-					case 1:
+					case TLW_CARGO: TrainDetailsCargoTab(v, px, py); break;
+					case TLW_INFORMATION:
 						/* Only show name and value for the 'real' part */
 						if (!IsArticulatedPart(v)) {
 							TrainDetailsInfoTab(v, px, py);
 						}
 						break;
-					case 2: TrainDetailsCapacityTab(v, px, py); break;
+					case TLW_SPEEDS: TrainDetailsSpeedsTab(v, 100, py); break;
+					case TLW_CAPACITY: TrainDetailsCapacityTab(v, px, py); break;
 				}
 				y += 14;
 
@@ -305,16 +348,16 @@
 		int mod;
 		const Vehicle *v;
 		switch (e->we.click.widget) {
-		case 2: /* name train */
+		case TLW_NAME: /* name train */
 			v = GetVehicle(w->window_number);
 			SetDParam(0, v->index);
 			ShowQueryString(STR_VEHICLE_NAME, STR_8865_NAME_TRAIN, 31, 150, w, CS_ALPHANUMERAL);
 			break;
-		case 6: /* inc serv interval */
+		case TLW_SERVICE_SCROLL_INC: /* inc serv interval */
 			mod = _ctrl_pressed? 5 : 10;
 			goto do_change_service_int;
 
-		case 7: /* dec serv interval */
+		case TLW_SERVICE_SCROLL_DEC: /* dec serv interval */
 			mod = _ctrl_pressed? -5 : -10;
 do_change_service_int:
 			v = GetVehicle(w->window_number);
@@ -325,16 +368,18 @@
 			DoCommandP(v->tile, v->index, mod, NULL, CMD_CHANGE_SERVICE_INT | CMD_MSG(STR_018A_CAN_T_CHANGE_SERVICING));
 			break;
 		/* details buttons*/
-		case 9:  // Cargo
-		case 10: // Information
-		case 11: // Capacities
-		case 12: // Total cargo
-			EnableWindowWidget(w,  9);
-			EnableWindowWidget(w, 10);
-			EnableWindowWidget(w, 11);
-			EnableWindowWidget(w, 12);
+		case TLW_CARGO:  // Cargo
+		case TLW_INFORMATION: // Information
+		case TLW_SPEEDS: // Speeds
+		case TLW_CAPACITY: // Capacities
+		case TLW_TOTAL_CARGO: // Total cargo
+			EnableWindowWidget(w, TLW_CARGO);
+			EnableWindowWidget(w, TLW_INFORMATION);
+			EnableWindowWidget(w, TLW_SPEEDS);
+			EnableWindowWidget(w, TLW_CAPACITY);
+			EnableWindowWidget(w, TLW_TOTAL_CARGO);
 			EnableWindowWidget(w, e->we.click.widget);
-			WP(w,traindetails_d).tab = e->we.click.widget - 9;
+			WP(w,traindetails_d).tab = e->we.click.widget;
 			SetWindowDirty(w);
 			break;
 		}
@@ -372,13 +417,16 @@
 { WWT_PUSHTXTBTN, RESIZE_TB,     14,  90, 178, 152, 163, STR_013D_INFORMATION, STR_8850_SHOW_DETAILS_OF_TRAIN_VEHICLES},
 { WWT_PUSHTXTBTN, RESIZE_TB,     14, 179, 268, 152, 163, STR_013E_CAPACITIES,  STR_8851_SHOW_CAPACITIES_OF_EACH},
 { WWT_PUSHTXTBTN, RESIZE_RTB,    14, 269, 357, 152, 163, STR_013E_TOTAL_CARGO, STR_8852_SHOW_TOTAL_CARGO},
-{  WWT_RESIZEBOX, RESIZE_LRTB,   14, 358, 369, 152, 163, 0x0,                  STR_RESIZE_BUTTON},
+{      WWT_PANEL, RESIZE_LRTB,   14, 358, 369, 152, 163, 0x0,                  STR_NULL},
+{ WWT_PUSHTXTBTN, RESIZE_TB,     14,   0,  89, 164, 175, STR_WAGON_SPEEDS,     STR_WAGON_SPEEDS_TOOLTIP},
+{      WWT_PANEL, RESIZE_RTB,    14,  90, 357, 164, 175, 0x0,                  STR_NULL},
+{  WWT_RESIZEBOX, RESIZE_LRTB,   14, 358, 369, 164, 175, 0x0,                  STR_RESIZE_BUTTON},
 {   WIDGETS_END},
 };
 
 
 static const WindowDesc _train_details_desc = {
-	WDP_AUTO, WDP_AUTO, 370, 164, 370, 164,
+	WDP_AUTO, WDP_AUTO, 370, 176, 370, 176,
 	WC_VEHICLE_DETAILS,WC_VEHICLE_VIEW,
 	WDF_STD_TOOLTIPS | WDF_STD_BTN | WDF_DEF_WIDGET | WDF_UNCLICK_BUTTONS | WDF_RESIZABLE,
 	_train_details_widgets,
@@ -403,5 +451,5 @@
 	w->resize.step_height = 14;
 	w->resize.height = w->height - 14 * 2; /* Minimum of 4 wagons in the display */
 
-	WP(w,traindetails_d).tab = 0;
+	WP(w,traindetails_d).tab = TLW_CARGO;
 }