基于停车线前置法的环形交叉口控制模型研究

发布时间：2018-05-22 18:50

本文选题：环形交叉口 + 信号控制　；参考：《重庆交通大学》2014年硕士论文

【摘要】：无信号环形交叉口对低饱和度的交通流具有较好的适应性，但随着城市化进程的不断加快，道路交通需求与日俱增，无信号环形交叉口的交通拥堵情况越来越严重，对环形交叉口进行信号控制已极为普遍。然而，在信号控制的环形交叉口中，车辆入环车速较慢，车间相互作用剧烈，入环过程耗费时间长，且较小的入环速度进一步阻碍后续车流的正常运行。因此，在保证车辆行车安全的前提下，以提高环形交叉口运行效率，减小延误为目的，提出新的信号控制方法，对环形交叉口控制模式理论研究具有重要意义。本文首先分析了环形交叉口的冲突特性以及交通流运行特性，并对环形交叉口单进口道放行方式和左转二次停车法的控制原理、控制模型进行了详细阐述，运用VISSIM仿真软件进行仿真，分析其适用性。在此基础上，提出了停车线前置法，详细阐述了该方法的控制思想。建立了停车线前置距离模型。以四叉环形交叉口为例，研究交叉口信号相位的设计方法。基于本向左转车流与相邻进口道（逆时针方向）直行车流出口相同，提出环形交叉口左直协同放行相位。以保证车流安全、提高环形交叉口通行能力为目的，建立重叠相位模型，给出相位重叠时间、绿灯间隔时间等参数的计算方法。并以Webster周期法为基础，针对非饱和与饱和环形交叉口，建立适合停车线前置法的周期时长模型。运用VISSIM仿真软件对不同半径，不同左转比例以及不同饱和度的交叉口进行仿真，，分析停车线前置法的适用条件。最后，利用VISSIM仿真软件，在相同条件下，对停车线前置法与现有环形交叉口控制方案进行对比分析。并以重庆市盘溪路环形交叉口为例，验证停车线前置法的有效性。
[Abstract]:Unsignalized roundabout has better adaptability to low saturation traffic flow. However, with the acceleration of urbanization, the demand for road traffic is increasing day by day, and the traffic congestion of unsignalized annular intersection is becoming more and more serious. It is very common to control the signal at roundabout. However, in the annular intersection of signal control, the speed of the vehicle entering the loop is slow, the interaction between the workshop and the workshop is intense, the process of entering the loop takes a long time, and the smaller speed of entering the loop further hinders the normal operation of the subsequent traffic flow. Therefore, in order to improve the efficiency and reduce the delay of circular intersection, a new signal control method is proposed, which is of great significance to the theoretical study of the control mode of circular intersection. In this paper, the conflict characteristics and traffic flow characteristics of annular intersection are analyzed firstly, and the control principle and control model of single entrance lane release method and left turn secondary stop method are described in detail. VISSIM simulation software is used to simulate and analyze its applicability. On the basis of this, the forward parking line method is put forward, and the control idea of this method is described in detail. The front distance model of parking line is established. In this paper, the design method of the signal phase of a quadrilateral circular intersection is studied. Based on the fact that the current left-turn flow is the same as the direct flow exit of the adjacent inlet (counterclockwise), the phase of the circular intersection is proposed. In order to ensure the safety of traffic flow and improve the traffic capacity of circular intersection, the overlapping phase model is established, and the calculation methods of parameters such as phase overlap time and green light interval are given. On the basis of Webster period method, a period time model suitable for parking line leading method is established for unsaturated and saturated circular intersection. The VISSIM software is used to simulate the intersection with different radius, different ratio of left turn and different saturation, and the applicable conditions of the front stop line method are analyzed. Finally, under the same conditions, the VISSIM simulation software is used to compare the control scheme between the front stop line method and the existing annular intersection. Taking the ring intersection of Panxi Road in Chongqing as an example, the validity of the front stop line method is verified.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U491.23

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