基于车载网的交通流量控制系统设计

发布时间：2018-01-19 10:48

本文关键词： 实时交通控制集群密度非线性纵向车间距控制车队及交通流的稳定性交通容量　出处：《大连海事大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着车辆的不断增加,使得交通压力变得愈发明显,世界各国都面临不同程度的交通拥堵问题。由于交通拥堵对经济、环境造成的影响更是毋庸置疑。为解决这种现状,该研究通过采用车辆自组织网络(VANET)以及车队系统,提出了一个新颖的实时交通控制系统。该系统主要包括两个部分。第一部分,提出了基于VANET的交通流检测及交通信号控制系统。该系统通过结合车与车(V2V)和车与基础设施(V2I)两种通讯方式,估计通往道路交叉口路段的车流密度,并传送所得到的相应信息给交通信号控制器。然后分析并评估所得到的数据,从而产生自适应的交通信号周期去缓解交通拥堵问题。通过与固定时长的周期控制方法相比较,该方法最独特的区别就是在连续的道路交叉口,通过考虑车辆在下一道路交叉口的目标方向和预期的信号配时,从而调节毗邻交叉口车流的交通流量。对给出的交通流检测及交通信号控制系统的算法进行仿真实验。结果表明,同固定时长的周期控制相比较,提出的该方法降低了车辆在道路交叉口的延误时间。第二部分,提出了车队间非线性的纵向车间距的策略,该方法既充分考虑了车辆的特点又结合了道路条件。通过给出的优化车间距的算法进行仿真实验。结果表明,同恒定时间间隔的车间距的策略相比较,该方法既保证了车队以及交通流的稳定性,又提高了交通容量。
[Abstract]:With the increasing of vehicles, the traffic pressure becomes more and more obvious, the countries all over the world are faced with different degrees of traffic congestion problem, because of the traffic congestion on the economy. The impact of the environment is beyond doubt. In order to solve this situation, the study adopts the vehicle Ad Hoc Network (VANET) and the vehicle fleet system. A novel real-time traffic control system is proposed. The system consists of two parts. The first part is the first part. This paper presents a traffic flow detection and traffic signal control system based on VANET, which combines two communication modes: vehicle / vehicle / V _ 2V) and vehicle / infrastructure / V _ 2I). Estimate the traffic density to the road intersection and transmit the corresponding information to the traffic signal controller. Then analyze and evaluate the obtained data. Thus the adaptive traffic signal cycle is generated to alleviate the traffic congestion problem. Compared with the fixed time cycle control method, the most unique difference of this method is in the continuous road intersection. By considering the target direction of the vehicle at the next intersection and the expected signal timing. The algorithm of traffic flow detection and traffic signal control system is simulated. The results show that the algorithm is compared with the periodic control with fixed time. The proposed method reduces the delay time of vehicles at road intersections. In the second part, the strategy of nonlinear longitudinal vehicle spacing between motorcade is proposed. This method not only fully considers the characteristics of vehicles but also combines the road conditions. Simulation experiments are carried out through the given algorithm to optimize the distance between vehicles. The results show that the method is compared with the strategy of the distance between vehicles at constant time intervals. This method not only ensures the stability of the motorcade and traffic flow, but also improves the traffic capacity.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U495

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