Highway optimization control method

The invention provides a highway optimization control method which comprises the following steps of: (1) dividing a section of highway into N intervals, and selecting a space-time discrete traffic flow model to represent the intervals of the highway, wherein each interval contains an entrance ramp and an exit ramp; (2) determining the regulation rate of each ramp by setting a highway multi-ramp combination control optimization target with maximal total flow of services and shortest mean waiting time of vehicles at each entrance ramp; (3) solving the highway multi-ramp combination control optimization model by adopting an ant colony algorithm; and (4) obtaining the optimal regulation rate of each entrance ramp in each section interval by the step (3), and regulating the traffic flow of each entrance ramp in each section interval according to the calculation results. Through the invention, a control algorithm is simplified, the calculation speed is high, and the control effect is optimized.