单点公交优先感应控制方法研究

发布时间：2018-11-02 08:27

【摘要】：在道路网中单个交叉口作为道路的基本单元,其运行状况直接影响公共交通的运行效率以及城市道路交通的畅通程度。因此如何改善公交车辆在交叉口的信号控制策略,对于减少公交车辆在交叉口的等待时间以及确保整个交叉口的通行效率又不受太大影响具有十分重要的意义。现在公交车辆在交叉口的信号控制主要分为定时和感应控制两种方式,由于感应控制是通过布设检测器等方式来实时获取车辆各种信息,因此感应控制能够适应交叉口车流变化的动态性和实时性等特点。首先,通过查阅文献了解公交车辆在交叉口是如何通过感应控制来达到优化效果的,具体包括公交优先的实现形式,感应控制参数设定以及检测器布设等内容。并有针对性的对检测器布设信息采集方式做了优化调整。其次,通过分析绿灯延长时间与车头时距的关系,给出了公交优先相位绿灯延长时间终止条件的优化方案,建立了基于公交优先相位社会车辆的车头时距的绿灯延长时间计算模型;再次,在非优先相位绿灯时间压缩方面,改变以往单一压缩固定值,改而通过确定当前相位的关键车道,根据当前相位各个车道到达情况实时来进行压缩。确保真正体现“公交优先”的内涵。最后,利用VISSIM仿真软件和VAP感应控制模块,结合实际案例分别采用传统感应控制和本文优化后的感应控制来进行模拟仿真,采用车均延误、平均排队长度、评价停车次数三个指标来验证文中的所提出的优化方案和控制逻辑可行性。结果表明,在不同层次的饱和度下,文中提出的优化方案对于实现公交优先、降低对社会车辆的影响、提高整个交叉口的运行效率具有明显的效果。
[Abstract]:As the basic unit of road in road network, the running condition of single intersection directly affects the running efficiency of public transport and the degree of unblocked urban road traffic. So how to improve the signal control strategy of the bus at the intersection is very important to reduce the waiting time of the bus at the intersection and to ensure the traffic efficiency of the whole intersection is not greatly affected. At present, the signal control of bus at intersections is mainly divided into two ways: timing and induction control. Because the inductive control is to obtain all kinds of vehicle information in real time by setting detectors and so on. Therefore, induction control can adapt to the dynamic and real-time characteristics of traffic flow change at intersection. First of all, by consulting the literature to understand how the bus in the intersection through induction control to achieve optimal results, including the realization of bus priority form, induction control parameters and detector layout and so on. And targeted to the detector layout information collection mode has made the optimization adjustment. Secondly, by analyzing the relationship between the green time extension and the headway distance, the optimization scheme of the stop condition of the public transit priority phase green light extension time is given. The calculation model of the green time extension of the headway time of the social vehicle based on the public transport priority phase is established. Thirdly, in the aspect of non-priority phase green time compression, we change the previous single compression fixed value, and then compress it in real time according to the arrival of each lane of the current phase by determining the key lane of the current phase. Ensure that the meaning of "bus priority" is truly reflected. Finally, using VISSIM simulation software and VAP induction control module, combined with actual cases, the traditional induction control and the optimized induction control are used to simulate the simulation. Three indexes of parking times are evaluated to verify the feasibility of the proposed optimization scheme and control logic. The results show that under different levels of saturation, the proposed optimization scheme has obvious effect on realizing public transport priority, reducing the influence on social vehicles and improving the operation efficiency of the whole intersection.
【学位授予单位】：兰州交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U491

【参考文献】