Abstract: The principle of on-ramp control strategies of urbanroad is represented,and some major on-ramp control strategies are classified,andthen,all kinds of control method models are given.Based on advantages and disadvantages of these strategies,the explicabilities are given respectively.By using the fuzzy control theory and the support vector machine algorithm,a new methodof on-ramp control strategy of urban freeway is proposed for some problems ofexisting control methods.The new method can satisfy demand that control strategy should change with the real-time changes of traffic condition in urban expressway.Finally,control strategies are obtained by using the control algorithm proposed in this study based on survey data of some major roads in Guangzhou.These new controlstrategies and previous control strategies are applied to actual control respectively.The control results show that the new control strategy can satisfies dynamicchanges of traffic condition by analyzing survey data and have a good effect onthe on-ramp control.The new control algorithm proposed in this study could provide a valuable reference for the urban on-ramp control.

Key words: urban freeway, on-ramp control, fuzzy control theory, support vector machine, algorithm research