Vehicle *GetPrevVehicleInChain(const Vehicle *v);

Vehicle *GetFirstVehicleInChain(const Vehicle *v);

uint CountVehiclesInChain(const Vehicle* v);

void DeleteVehicleChain(Vehicle *v);

void *VehicleFromPos(TileIndex tile, void *data, VehicleFromPosProc *proc);

void CallVehicleTicks(void);