过饱和状况下的城市道路区域交通信号配时优化方法

发布时间：2018-03-29 03:01

本文选题：城市道路　切入点：过饱和　出处：《东南大学》2015年硕士论文

【摘要】：过饱和状况下的交通信号控制配时参数优化方法是当前城市道路交通管理控制领域的研究重点。针对当前过饱和状况下的交通信号控制配时参数优化手段的缺陷和不足,本文提出了基于交叉口交通需求传递特性的过饱和状况下的信号控制配时参数优化思路,结合信号控制子区动态划分技术,实现了过饱和状况下的区域信号控制参数配时优化。基于城市道路路段与交叉口的实测交通流数据,论文对交通流在时空上的分布和传递特性进行了分析,以动态弯曲距离指标定量描述了交通需求在交叉口的关联和传递特性,为过饱和状况下的交通信号控制配时参数优化方法的研究提供了依据。在区域交通信号控制子区动态划分方法研究方面,论文基于交叉口交通需求传递的交通信号控制配时参数优化思路,提出了过饱和状况下的信号控制子区动态划分流程,重点对关键交叉口判别方法和区域交通信号控制子区划分方法进行了详细介绍。就区域内关键交叉口的判别而言,论文以最大周期和最大饱和度阈值条件下可通过的最大交通需求作为交通承载能力,并以此作为关键交叉口的判断依据。就区域交通信号控制子区划分而言,论文基于交通需求传递特性,以关键交叉口为起点,基于相邻交叉口间的关联性依次向上游推演相关交叉口最优的交通需求释放量,由此获得关联交叉口的集合,进而实现了过饱和状况下区域交通信号控制子区的动态划分。在区域交通信号控制配时参数优化方法研究方面,论文提出了区域交通信号控制配时参数优化策略,重点分析了过饱和状况下的交通信号控制配时参数优化方法。基于区域信号控制子区划分过程中生成的交叉口最优交通承载力,在保持原有信号控制配时方案的相位和绿信比基础上,论文实现了过饱和状况下的区域交通信号控制配时参数,即周期时长和绿灯时间的实时动态优化。以交叉口通行效率、平均延误和平均排队长度作为性能评估指标,论文对本文所述方法进行了评估,结果显示本文提出的基于实时交通需求的信号配时参数优化方法能够有效提升交叉口的通行效率。
[Abstract]:The optimization method of traffic signal control timing parameters under the condition of supersaturation is the focus of research in the field of traffic management and control of urban roads at present. In this paper, based on the characteristics of traffic demand transfer at intersections, the idea of optimizing signal control timing parameters under the condition of supersaturation is put forward, combined with the dynamic division technology of signal control subareas. Based on the measured traffic flow data of urban road sections and intersections, the distribution and transfer characteristics of traffic flow in time and space are analyzed. The correlation and transfer characteristics of traffic demand at intersections are quantitatively described by the dynamic bending distance index. It provides the basis for the study of the optimization method of traffic signal control timing parameters under the condition of supersaturation. Based on the train of thought of traffic signal control timing parameter optimization in intersection traffic demand transmission, the paper puts forward the dynamic division flow of signal control sub-area under the condition of supersaturation. The methods of distinguishing key intersections and subareas of regional traffic signal control are introduced in detail. As far as the discrimination of key intersections in the region is concerned, In this paper, the maximum traffic demand under the maximum period and maximum saturation threshold is taken as the traffic carrying capacity, and it is used as the judgment basis of the key intersection. As far as the division of regional traffic signal control sub-area is concerned, Based on the characteristics of traffic demand transmission and the key intersection as the starting point, based on the correlation between adjacent intersections, the optimal traffic demand release from related intersections is deduced in turn, and the set of related intersections is obtained. Furthermore, the dynamic division of the regional traffic signal control sub-area is realized under the condition of supersaturation. In the aspect of the research on the optimization method of the regional traffic signal control timing parameters, the paper puts forward the optimization strategy of the regional traffic signal control timing parameter. The optimization method of traffic signal timing parameters under the condition of supersaturation is analyzed emphatically. Based on the optimal traffic carrying capacity of intersection generated in the process of subdivision of regional signal control sub-area, On the basis of maintaining the phase and green signal ratio of the original signal control timing scheme, the paper realizes the real-time dynamic optimization of the regional traffic signal control timing parameters under the condition of supersaturation, that is, the period length and the green light time, in order to achieve the intersection traffic efficiency. The average delay and average queue length are used as performance evaluation indexes. The results show that the proposed signal timing parameter optimization method based on real-time traffic demand can effectively improve the traffic efficiency of intersections.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U491.54

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