diff --git a/src/base_consist.h b/src/base_consist.h
--- a/src/base_consist.h
+++ b/src/base_consist.h
@@ -18,8 +18,18 @@
 /** Various front vehicle properties that are preserved when autoreplacing, using order-backup or switching front engines within a consist. */
 struct BaseConsist {
 	char *name;                         ///< Name of vehicle
+
+	/* Used for timetabling. */
+	uint32 current_order_time;          ///< How many ticks have passed since this order started.
+	int32 lateness_counter;             ///< How many ticks late (or early if negative) this vehicle is.
+	Date timetable_start;               ///< When the vehicle is supposed to start the timetable.
+
 	Date service_interval;              ///< The interval for (automatic) servicing; either in days or %.
+
 	VehicleOrderID cur_real_order_index;///< The index to the current real (non-implicit) order
+	VehicleOrderID cur_implicit_order_index;///< The index to the current implicit order
+
+	byte vehicle_flags;                 ///< Used for gradual loading and other miscellaneous things (@see VehicleFlags enum)
 
 	BaseConsist() : name(NULL) {}
 	virtual ~BaseConsist();