Study On The Design And Applicability For Turning Traffic At The Signalized Intersection

Intersection has the function of turning and link, and ensures to carry out the accessibility of traffic. Intersection is not only the place where traffic accidents occur frequently, but bottleneck that restricts capacity of the whole road network.The thesis analyzed the operation features of the signalized intersection firstly. According to analyses the position and number of the potential conflict points which have the difference after the design of space and time, it showed that turning traffic took on the function of turning which was the difficulty in the intersection. By analysesing the operation features and the influencing factors of turning traffic, and considering research summarization, it ascertained that the research were the traffic design of u-turn,right turn and coordination bus-only approaches with turning traffic.In the research of traffic design of right turn, the thesis combined the present situation and operation characteristics of u-turn, and summarized the main influencing factors, and summed up three kinds design patterns including their design of space and time. Then it analyzed the applicability by comparison of the security and capacity. In the analysis of capacity, this study proposed the capacity models of u-turn under the right turn, and demarcated the parameters with the survey.This study combined quantitative and qualitative evaluation in the research of traffic design of right turn, and focused on the geometric design and applicability of the design factors of right turn: the width of lane with the turning radius,the design of island of diversion channel.Finally, this thesis abstracted the problem in coordination bus-only approaches with turning traffic by their phenomenon, and indicated that the solutions were traffic organization and replacement of the lane function. This study analyzed the design patterns of bus lane in roadside with right turn, and proposed the delay model to gives appropriate solution of the design patterns.This thesis focused on the u-turn and right turn in the turning movements, analyzed their operation system and optimization design of the space and time, and gave the gives appropriate solution by the evaluation of the security and capacity. Its achievement can enrich signalized intersection theory, provide the technology and method for design and reforming in intersections of China, and gives the suggestions for the design of bus priority in intersections.