Research On Coordination Methods Of Expressway Ramp And Adjacent Intersection Under Actuated Control

The urban expressway which links the city between the regions and cities outside of the trunk road traffic contact is the backbone of the city transport network. Because of the rapid, high-capacity characteristics of the urban expressway, so it can meet the requirements of the sustainable development of sustainable. But in recent years the issue of highway traffic congestion is becoming more prominent and seriously affects the efficiency of urban transport. Although the ramp metering control can reduce urban expressway congestion, the congestion was transferred to the roads which are connected to the urban expressway. It is necessary to research the coordination control of Interaction region which components of the urban expressway and the adjacent road.This paper is researched basing on the National Key Basic Research Development Program (973)-funded project (2006CB705505): "Big City Traffic Jams Bottleneck Problem of the Basic Science Research" and mainly research the coordination control methods of the urban expressway ramp and the adjacent Intersection under actuated control.In this paper, the main research object is the diamond interchange which has the frontage roads along the main road of the expressway and in-depth study of the coordination control methods of the urban expressway ramp and the adjacent Intersection under actuated control. The full text is divided into five chapters.The first chapter is the introduction part of the paper which introduced the research background, research status, research scope, as well as the purpose and significance of research methods and ideas.The second chapter is the basis part of the paper. This chapter mainly introduces the study of the characteristics of traffic congestion, and find out the identify factors of the traffic congestion. In order to analyze the reasons for traffic jams ,this chapter first analyzes design features of the urban expressway and the general roads, and then introduces the connected road forms in the Interaction region, and last summed up the congestion characteristics of the region from the construction of road infrastructure, traffic management and vehicle operation law. The third chapter is also the basis part of the paper. It mainly introduced the local control Methods which was used to solve the local traffic congestion. This chapter analyzes the existing control strategy and algorithm characteristics of the on-ramp metering control, off-ramp metering control and adjacent intersection signal control, and then concluded the control method features and application conditions.The fourth chapter is the signify part of the paper. It mainly studied the coordination control strategy of the urban expressway ramp and the adjacent Intersection under actuated control. This chapter introduced the concept of balance Philosophy and then produced the coordination control strategy. Then the coordination control object is formed and it studied the coordinated control actuated rules, analyzed the principles laid of the actuated detector. Eventually this paper formed coordination control strategy of the urban expressway ramp and the adjacent Intersection under actuated control.The fifth chapter is also the signify part of the paper. It mainly studied the coordination control algorithm of the urban expressway ramp and the adjacent Intersection under actuated control. This part studied the coordination control algorithm basting on the coordination control strategy. After integrating to the diamond interchange, this paper produced the actuated coordination control framework.The sixth chapter is the coordination control algorithm test and analysis part of the paper. In order to test and analysis the actuated coordination control effectiveness, this paper established the simulation testing platform by the VISSIM which is the microcosmic simulation software and the traffic network of diamond interchange. At the same time, the application of mathematical methods of statistical analysis, simulation test data analyses have been given clear control over results.The final chapter is the summary and prospect part of the paper. This chapter summarizes the thesis of the research work, analysis of the inadequacies of the paper and made a follow-up research works.