Index: src/settings.cpp
===================================================================
--- src/settings.cpp	(revision 11474)
+++ src/settings.cpp	(working copy)
@@ -1388,6 +1388,9 @@
 
 	/***************************************************************************/
 	/* Vehicle section of the GUI-configure patches window */
+	SDT_CONDBOOL(Patches, no_hill_slowdown,         83, SL_MAX_VERSION, 0, 0, false, STR_CONFIG_PATCHES_NOHILLSLOWDOWN,       NULL),
+	SDT_CONDBOOL(Patches, no_curve_slowdown,        83, SL_MAX_VERSION, 0, 0, false, STR_CONFIG_PATCHES_NOCURVESLOWDOWN,      NULL),
+
 	SDT_BOOL(Patches, realistic_acceleration,        0, 0, false,                    STR_CONFIG_PATCHES_REALISTICACCEL,       NULL),
 	SDT_BOOL(Patches, forbid_90_deg,                 0, 0, false,                    STR_CONFIG_PATCHES_FORBID_90_DEG,        NULL),
 	SDT_BOOL(Patches, mammoth_trains,                0,NN,  true,                    STR_CONFIG_PATCHES_MAMMOTHTRAINS,        NULL),
Index: src/lang/english.txt
===================================================================
--- src/lang/english.txt	(revision 11474)
+++ src/lang/english.txt	(working copy)
@@ -1028,6 +1028,8 @@
 STR_CONFIG_PATCHES_CATCHMENT                                    :{LTBLUE}Allow more realistically sized catchment areas: {ORANGE}{STRING1}
 STR_CONFIG_PATCHES_EXTRADYNAMITE                                :{LTBLUE}Allow removal of more town-owned roads, bridges, etc: {ORANGE}{STRING1}
 STR_CONFIG_PATCHES_MAMMOTHTRAINS                                :{LTBLUE}Enable building very long trains: {ORANGE}{STRING1}
+STR_CONFIG_PATCHES_NOHILLSLOWDOWN                               :{LTBLUE}Disable slowdown on hills for trains: {ORANGE}{STRING1}
+STR_CONFIG_PATCHES_NOCURVESLOWDOWN                              :{LTBLUE}Disable slowdown on curves for trains: {ORANGE}{STRING1}
 STR_CONFIG_PATCHES_REALISTICACCEL                               :{LTBLUE}Enable realistic acceleration for trains: {ORANGE}{STRING1}
 STR_CONFIG_PATCHES_FORBID_90_DEG                                :{LTBLUE}Forbid trains and ships to make 90 deg turns: {ORANGE}{STRING1} {LTBLUE} (requires NPF)
 STR_CONFIG_PATCHES_JOINSTATIONS                                 :{LTBLUE}Join train stations built next to each other: {ORANGE}{STRING1}
Index: src/settings_gui.cpp
===================================================================
--- src/settings_gui.cpp	(revision 11474)
+++ src/settings_gui.cpp	(working copy)
@@ -718,6 +718,8 @@
 };
 
 static const char *_patches_vehicles[] = {
+	"no_hill_slowdown",
+	"no_curve_slowdown",
 	"realistic_acceleration",
 	"forbid_90_deg",
 	"mammoth_trains",
@@ -992,7 +994,7 @@
 {   WWT_CLOSEBOX,   RESIZE_NONE,    10,     0,    10,     0,    13, STR_00C5,                        STR_018B_CLOSE_WINDOW},
 {    WWT_CAPTION,   RESIZE_NONE,    10,    11,   369,     0,    13, STR_CONFIG_PATCHES_CAPTION,      STR_018C_WINDOW_TITLE_DRAG_THIS},
 {      WWT_PANEL,   RESIZE_NONE,    10,     0,   369,    14,    41, 0x0,                             STR_NULL},
-{      WWT_PANEL,   RESIZE_NONE,    10,     0,   369,    42,   380, 0x0,                             STR_NULL},
+{      WWT_PANEL,   RESIZE_NONE,    10,     0,   369,    42,   401, 0x0,                             STR_NULL},
 
 {    WWT_TEXTBTN,   RESIZE_NONE,     3,    10,    96,    16,    27, STR_CONFIG_PATCHES_GUI,          STR_NULL},
 {    WWT_TEXTBTN,   RESIZE_NONE,     3,    97,   183,    16,    27, STR_CONFIG_PATCHES_CONSTRUCTION, STR_NULL},
@@ -1004,7 +1006,7 @@
 };
 
 static const WindowDesc _patches_selection_desc = {
-	WDP_CENTER, WDP_CENTER, 370, 381, 370, 381,
+	WDP_CENTER, WDP_CENTER, 370, 402, 370, 402,
 	WC_GAME_OPTIONS, WC_NONE,
 	WDF_STD_TOOLTIPS | WDF_STD_BTN | WDF_DEF_WIDGET,
 	_patches_selection_widgets,
Index: src/saveload.cpp
===================================================================
--- src/saveload.cpp	(revision 11474)
+++ src/saveload.cpp	(working copy)
@@ -29,7 +29,7 @@
 #include "strings.h"
 #include <list>
 
-extern const uint16 SAVEGAME_VERSION = 82;
+extern const uint16 SAVEGAME_VERSION = 83;
 uint16 _sl_version;       ///< the major savegame version identifier
 byte   _sl_minor_version; ///< the minor savegame version, DO NOT USE!
 
Index: src/train_cmd.cpp
===================================================================
--- src/train_cmd.cpp	(revision 11474)
+++ src/train_cmd.cpp	(working copy)
@@ -2650,7 +2650,7 @@
 /** Modify the speed of the vehicle due to a turn */
 static void AffectSpeedByDirChange(Vehicle* v, Direction new_dir)
 {
-	if (_patches.realistic_acceleration) return;
+	if (_patches.no_curve_slowdown) return;
 
 	DirDiff diff = DirDifference(v->direction, new_dir);
 	if (diff == DIRDIFF_SAME) return;
@@ -2662,7 +2662,7 @@
 /** Modify the speed of the vehicle due to a change in altitude */
 static void AffectSpeedByZChange(Vehicle *v, byte old_z)
 {
-	if (old_z == v->z_pos || _patches.realistic_acceleration) return;
+	if (old_z == v->z_pos || _patches.no_hill_slowdown) return;
 
 	const RailtypeSlowdownParams *rsp = &_railtype_slowdown[v->u.rail.railtype];
 
Index: src/variables.h
===================================================================
--- src/variables.h	(revision 11474)
+++ src/variables.h	(working copy)
@@ -117,6 +117,8 @@
 	bool nonuniform_stations;           // allow nonuniform train stations
 	bool adjacent_stations;             // allow stations to be built directly adjacent to other stations
 	bool always_small_airport;          // always allow small airports
+	bool no_hill_slowdown;              // no hill slowdown for trains
+	bool no_curve_slowdown;             // no curve slowdown for trains
 	bool realistic_acceleration;        // realistic acceleration for trains
 	bool wagon_speed_limits;            // enable wagon speed limits
 	bool forbid_90_deg;                 // forbid trains to make 90 deg turns