信号交叉口车道功能动态划分的基础研究

With the worsening of urban traffic congestion problem, research on solving congestion problem at intersections is in urgent need. Dynamic lane channelization aims to realize the optimization of time and space resources by dynamically adjusting the approach lane function at intersections with unbalance traffic flow in terms of time and direction. It provides a new way of thinking on traffic management of the intersection. This project will study the traffic flow characteristics, based on which the impact of dynamic lane function assignment on intersection capacity and traffic operations will be determined. Establish driver behavior models at intersetions with implementation of dymanic lane channerlizaiton to conduct in-depth analysis of the driver behavior under such scenario. These models will further be served as basis for the study on impact of the dynamic lane change on operational efficiency and safety of the intersection. Build traffic conflict models to investigate the conflict formation mechanism during the dynamic lane change, so as to provide measures for the safety design of the dynamic lane channelization. Solve for the lane function assignment and signal timing schemes from the coordinated optimizatin model of dynamic lane function assignment and signal timing. Propose warrants for the dynamic lane function assignment and the protective left-turn phase. Based on the research findings of the above key issues, provide scientific basis and method for the dynamic lane function assignment from both the operational and safety perspectives, so as to improve variable lane design theory and support for the application of variable lane technology.

随着城市交通拥堵问题的日益恶化，解决交叉口的拥堵问题，是一个迫切需要研究的课题。交叉口车道功能动态划分是针对交叉口出现的时段性、方向性不均衡交通流，对车道功能进行动态调整以达到时空资源的优化，为交叉口车流的组织、管理提供了新的思路。本项目对信号交叉口可变车道环境下的交通流特征进行分析，确定车道功能动态划分对交叉口通行能力和车流运行效率的影响。建立可变车道环境下的驾驶员行为模型，深入剖析车道功能动态划分对驾驶员行为的影响，进而分析其对交叉口运行效率与安全的作用。建立可变车道环境下的交通冲突模型，揭示交通冲突形成机理，为可变车道方案的安全设计提供依据。建立车道功能动态划分与信号配时协同优化模型，提出车道功能动态划分以及该环境下左转保护相位设置的依据和方法。基于对以上关键问题的研究成果，从效率和安全的角度出发，完善交叉口渠化区可变车道设计理论，为可变车道技术的应用提供支撑。

随着城市交通拥堵问题的日益恶化，解决交叉口的拥堵问题，是一个迫切需要研究的课题。交叉口车道功能动态划分是针对交叉口出现的时段性、方向性不均衡交通流，对车道功能进行动态调整以达到时空资源的优化，为交叉口车流的组织、管理提供了新的思路。本项目对信号交叉口可变车道环境下的交通流特征进行分析，确定车道功能动态划分对交叉口通行能力和车流运行效率的影响。在深入剖析交叉口驾驶员行为的基础上，分析车道功能动态划分对交叉口运行效率的作用，建立了车道功能动态划分与信号配时协同优化模型。同时，建立了可变车道环境下的交通冲突模型，为可变车道方案的安全设计提供依据。基于对以上关键问题的研究成果，从效率和安全的角度出发，完善交叉口渠化区可变车道设计理论，为可变车道技术的应用提供支撑。