【作者】 尤海亮；

【导师】 邹难；

【作者基本信息】 山东大学 ， 控制科学与工程， 2013， 硕士

【摘要】 随着城市经济的快速发展,交通需求和交通供给矛盾逐渐激化,交通拥堵现象日益严重。改善城市道路交通状况已刻不容缓。智能交通系统(ITS)处于当今世界交通科技的前沿,代表着21世纪交通体系的发展方向。ITS的发展对改善城市道路服务质量、缓解城市道路交通拥堵有着重要意义。面向ITS的交通信息服务系统是适应城市发展智能交通系统的需要。城市主干道是城市道路交通网络中的核心道路,关系着城市社会经济的快速发展。本文以城市干道为研究对象,开展了关于解决城市主干道交通问题的研究,重点从信号控制、交通状况评估和系统建设三方面进行研究。首先,本文结合考虑了支路车流汇入主干道及车辆离散性的影响,建立了以城市干道车辆总延误最小为目标函数的优化模型,并结合混沌优化算法和小步长单向搜索算法来综合优化相位差、绿信比和信号周期。本文设计了四个交叉口的干道仿真案例,仿真结果表明,在支路车辆汇入主干道的流量比例高达50%至70%之间的情况下,本文建立的模型相对于MAXBAND方法在总延误上改善了20.09%。其次,本文利用占有率来评估城市道路交通运行状况。这一部分从三个方面来研究：第一,采用瞬时速度分布图和占有率数据图匹配的方法确定检测器最佳检测位置,并通过对塔南路主干道进行仿真分析,最终确定该主干道检测器宜安装在停车线上游50m处。第二,结合占有率和旅行时间来评估协调控制下的干道运行效率。第三,提出了周期-占有率关系图的概念,采用可视化图形分析方法对塔南路主干道的其中两个交叉口进行仿真分析,确定其最优相位差。仿真结果表明,相位差调整后的旅行时间相对于初始情况减少了0.57min。最后,本文粗略地探讨了城市干道信号控制信息系统的框架体系、结构和功能。更多还原

【Abstract】 With the rapid development of the economic, the conflict between traffic demand and traffic supply has intensified gradually, and the traffic congestion is becoming increasingly serious. Improving the urban road traffic conditions has become essential. Intelligent Transportation System(ITS) is in the forefront of traffic science and technology in today’s world. It represents the development direction of21st century transportation system. The development of ITS is of great significance to improve the service quality of urban roads and ease traffic congestion. For ITS transportation information service system is adapt to the needs of urban development of intelligent transportation system. Urban arterial is the core of urban traffic network, and it is important for the city of rapid development of social economy. Taking it as the study object, this paper conductes the study to solve the traffic problems in urban arterial and studies from three aspects which conclude the signal control, traffic condition evaluation and system development.First of all, considering the influence of flow from minor road and the discrete property of the fleet, this paper proposes a model of minimize total delay of vehicles on urban arterial and a method which conbines the chaos optimization algorithm and a small step-way search algorithim to synthetically optimize the offset, split and cycle. The designed of simulation case for four intersections shows that this model compared whih MAXBAND method has improved20.09%on the total delay when the proportion of vehicles from minor road is between50%and70%.Secondly, this paper uses the occupancy to assess the traffic condition. This part studies from three aspects. First, this paper uses the matching method on the velocity diagram and occupancy data diagram to determine the best detection position of the detectior. The detector should be installed at the upstream50m far away from the stop line on the Tanan Road by designing a simulation case. Second, the combination of occupancy and travel time to evaluate the quality of service on signalized arterial is proposed. Third, this paper proposes the concept of the cycle-occupancy diagram(COD). A method to adjust the offset is used to analyze two intersections on Tanan Road and the optimal offset is obtained. After adjusting the offset, the travel time between the two intersections reduces0.57min.Finally, this paper roughly explores the system framework, structure and basic function of the Arterial Signal Control Information System(ACIS).更多还原