Index: src/newgrf.cpp
===================================================================
--- src/newgrf.cpp	(revision 16943)
+++ src/newgrf.cpp	(working copy)
@@ -3771,8 +3771,9 @@
 			*value = _misc_grf_features;
 
 			/* Add the local flags */
-			assert(!HasBit(*value, GMB_TRAIN_WIDTH_32_PIXELS));
+			assert(!HasBit(*value, GMB_TRAIN_WIDTH_32_PIXELS) && !HasBit(*value, GMB_ROADVEH_WIDTH_32_PIXELS));
 			if (_cur_grffile->traininfo_vehicle_width == VEHICLEINFO_FULL_VEHICLE_WIDTH) SetBit(*value, GMB_TRAIN_WIDTH_32_PIXELS);
+			if (_cur_grffile->roadvehinfo_vehicle_width == VEHICLEINFO_FULL_VEHICLE_WIDTH) SetBit(*value, GMB_ROADVEH_WIDTH_32_PIXELS);
 			return true;
 
 		/* case 0x1F: // locale dependent settings not implemented */
@@ -4786,9 +4787,11 @@
 
 			/* Set train list engine width */
 			_cur_grffile->traininfo_vehicle_width = HasGrfMiscBit(GMB_TRAIN_WIDTH_32_PIXELS) ? VEHICLEINFO_FULL_VEHICLE_WIDTH : TRAININFO_DEFAULT_VEHICLE_WIDTH;
+			_cur_grffile->roadvehinfo_vehicle_width = HasGrfMiscBit(GMB_ROADVEH_WIDTH_32_PIXELS) ? VEHICLEINFO_FULL_VEHICLE_WIDTH : ROADVEHINFO_DEFAULT_VEHICLE_WIDTH;
 
 			/* Remove the local flags from the global flags */
 			ClrBit(_misc_grf_features, GMB_TRAIN_WIDTH_32_PIXELS);
+			ClrBit(_misc_grf_features, GMB_ROADVEH_WIDTH_32_PIXELS);
 			break;
 
 		case 0x9F: // locale-dependent settings
@@ -5629,6 +5632,7 @@
 	/* Initialise local settings to defaults */
 	newfile->traininfo_vehicle_pitch = 0;
 	newfile->traininfo_vehicle_width = TRAININFO_DEFAULT_VEHICLE_WIDTH;
+	newfile->roadvehinfo_vehicle_width = ROADVEHINFO_DEFAULT_VEHICLE_WIDTH;
 
 	/* Copy the initial parameter list */
 	assert(lengthof(newfile->param) == lengthof(config->param) && lengthof(config->param) == 0x80);
Index: src/depot_gui.cpp
===================================================================
--- src/depot_gui.cpp	(revision 16943)
+++ src/depot_gui.cpp	(working copy)
@@ -279,7 +279,7 @@
 				break;
 			}
 
-			case VEH_ROAD:     DrawRoadVehImage( v, x + 24, sprite_y, this->sel, ROADVEHINFO_DEFAULT_VEHICLE_WIDTH); break;
+			case VEH_ROAD:     DrawRoadVehImage( v, x + 24, sprite_y, this->sel, VEHICLEINFO_FULL_VEHICLE_WIDTH); break;
 			case VEH_SHIP:     DrawShipImage(    v, x + 19, sprite_y - 1, this->sel); break;
 			case VEH_AIRCRAFT: {
 				const Sprite *spr = GetSprite(v->GetImage(DIR_W), ST_NORMAL);
Index: src/newgrf.h
===================================================================
--- src/newgrf.h	(revision 16943)
+++ src/newgrf.h	(working copy)
@@ -32,6 +32,7 @@
 	GMB_TRAIN_WIDTH_32_PIXELS  = 3, ///< Use 32 pixels per train vehicle in depot gui and vehicle details. Never set in the global variable; @see GRFFile::traininfo_vehicle_width
 	GMB_AMBIENT_SOUND_CALLBACK = 4, // Unsupported.
 	GMB_CATENARY_ON_3RD_TRACK  = 5, // Unsupported.
+	GMB_ROADVEH_WIDTH_32_PIXELS= 6, ///< Use 32 pixels per road vehicle in depot gui and vehicle details. Never set in the global variable; @see GRFFile::roadvehinfo_vehicle_width   FIXME Is 32 actually correct?
 };
 
 enum GrfSpecFeature {
@@ -107,8 +108,9 @@
 	uint8 railtype_max;
 	RailTypeLabel *railtype_list;
 
-	int traininfo_vehicle_pitch;  ///< Vertical offset for draing train images in depot GUI and vehicle details
-	int traininfo_vehicle_width;  ///< Width (in pixels) of a 8/8 train vehicle in depot GUI and vehicle details
+	int traininfo_vehicle_pitch;         ///< Vertical offset for draing train images in depot GUI and vehicle details
+	int traininfo_vehicle_width;         ///< Width (in pixels) of a 8/8 train vehicle in depot GUI and vehicle details
+	int roadvehinfo_vehicle_width;       ///< Width (in pixels) of a 8/8 road vehicle in depot GUI and vehicle details
 };
 
 extern GRFFile *_first_grffile;
Index: src/roadveh_cmd.cpp
===================================================================
--- src/roadveh_cmd.cpp	(revision 16943)
+++ src/roadveh_cmd.cpp	(working copy)
@@ -13,6 +13,7 @@
 #include "company_func.h"
 #include "vehicle_gui.h"
 #include "articulated_vehicles.h"
+#include "newgrf.h"
 #include "newgrf_engine.h"
 #include "newgrf_sound.h"
 #include "yapf/yapf.h"
@@ -94,6 +95,11 @@
 {
 	int reference_width = ROADVEHINFO_DEFAULT_VEHICLE_WIDTH;
 
+	const Engine *e = Engine::Get(this->engine_type);
+	if (e->grffile != NULL) {
+		reference_width = e->grffile->roadvehinfo_vehicle_width;
+	}
+
 	if (offset != NULL) {
 		offset->x = reference_width / 2;
 		offset->y = 0;