diff -r 17ad53748c7b -r eb8f1b5b2883 src/vehicle_gui.cpp
--- a/src/vehicle_gui.cpp	Fri Oct 19 22:46:55 2007 +0000
+++ b/src/vehicle_gui.cpp	Sat Oct 20 00:09:39 2007 +0000
@@ -2086,9 +2086,16 @@
 					DoCommandP(v->tile, v->index, 0, NULL,
 										 _vehicle_command_translation_table[VCT_CMD_START_STOP][v->type]);
 					break;
-				case VVW_WIDGET_CENTER_MAIN_VIEH: /* center main view */
-					ScrollMainWindowTo(v->x_pos, v->y_pos);
-					break;
+				case VVW_WIDGET_CENTER_MAIN_VIEH: {/* center main view */
+					const Window *mainwindow = FindWindowById(WC_MAIN_WINDOW, 0);
+					/* code to allow the main window to 'follow' the vehicle if the ctrl key is pressed */
+					if (_ctrl_pressed && mainwindow->viewport->zoom == ZOOM_LVL_NORMAL) {
+						WP(mainwindow, vp_d).follow_vehicle = v->index;
+					} else {
+						ScrollMainWindowTo(v->x_pos, v->y_pos);
+					}
+				} break;
+
 				case VVW_WIDGET_GOTO_DEPOT: /* goto hangar */
 					DoCommandP(v->tile, v->index, _ctrl_pressed ? DEPOT_SERVICE : 0, NULL,
 						_vehicle_command_translation_table[VCT_CMD_GOTO_DEPOT][v->type]);