1 Introduction
In these days, computer-based coordinated traffic control systems are adopted in most of the large cities in the world, they are used for realizing the optimal management-control of traffic flow. However, in order to set the control goal, optimal forecasting models are always needed in project design. Unfortunately, most of the current traffic forecasting models can't be obtained to meet the desired precision. In order to improve the control precision, on one hand we can develop new forecasting method with high accuracy, on the other hand we can also try to find out new control structures. In this paper, a new double loops control structure is put forward based on slaving principle in self-organization theory.