基于路网服务水平的路网储备容量研究

发布时间：2019-01-07 15:06

【摘要】：随着社会经济的快速发展,城市人口基数、机动车规模不断扩大,使得交通供给和交通需求矛盾日益突出,因此,如何提高路网容量满足不断增长的交通需求,缓解城市交通压力是我们亟待解决的难题。城市道路网容量是交通供给系统,其服务能力关系到城市交通的可持续发展、城市的经济发展水平及人民出行质量,而为了提高乘客出行时越来越重视的“舒适感”,将路网服务水平纳入路网储备容量中研究具有十分重要的实际意义。本文以路网容量的基本理论为切入点,综合已有的相关知识及研究基础,针对本文的研究目的,重新定义了路网容量；将其按照不同条件进行分类,深入分析对路网容量的主要影响因素及相应的优化方法；然后从微观和宏观两个角度来分析服务水平的评价指标,最终选择路网饱和度这一参数作为评价交通网络的关键指标,以此设定了判断路网服务水平的划分等级标准,且对路网服务水平与路网容量的关系做了简约分析,得出路网服务水平对交通网络容量有着不可忽视的影响作用。为此,建立了基于路网服务水平的路网储备容量双层规划模型来深入分析两者的关系：上层优化目标为含网络服务水平约束的基本OD需求乘子的最大化问题；下层为出行者的路径选择原则满足基于Logit的随机用户均衡交通分配问题。本文设计了增量分配法与连续平均法相结合的算法求解双层规划模型。最后通过一个小型测试网络验证了模型和算法的有效性。结果分析表明：路网服务水平与路网储备容量是正相关的,道路交通拥堵愈严重,交通需求量乘子愈大。
[Abstract]:With the rapid development of social economy, the urban population base and the scale of motor vehicles are expanding, which makes the contradiction between traffic supply and traffic demand more and more prominent. Therefore, how to improve the capacity of road network to meet the increasing traffic demand, Relieving urban traffic pressure is a difficult problem we need to solve urgently. The capacity of urban road network is a traffic supply system, and its service ability is related to the sustainable development of urban transportation, the level of urban economic development and the quality of people's travel. In order to improve the "comfort" that passengers pay more and more attention to when travelling, the capacity of urban road network is related to the sustainable development of urban transportation. It is of great practical significance to study the service level of road network into the reserve capacity of road network. This paper takes the basic theory of road network capacity as the breakthrough point, synthesizes the related knowledge and the research foundation, aiming at the research purpose of this paper, redefines the road network capacity; It is classified according to different conditions, and the main factors affecting the capacity of road network and the corresponding optimization methods are deeply analyzed. Then the evaluation index of service level is analyzed from the micro and macro angles. Finally, the parameter of road network saturation is selected as the key index to evaluate the traffic network, and the grading standard is set up to judge the service level of road network. The relationship between the network service level and the network capacity is analyzed, and it is concluded that the network service level has an important effect on the traffic network capacity. For this reason, a bilevel programming model of road network reserve capacity based on network service level is established to analyze the relationship between them in depth. The upper optimization goal is to maximize the basic OD demand multiplier with network service level constraints; The path selection principle for travelers at the lower level satisfies the traffic assignment problem of stochastic user equilibrium based on Logit. In this paper, the incremental allocation method and the continuous average method are designed to solve the bilevel programming model. Finally, the validity of the model and algorithm is verified by a small test network. The results show that the service level of the road network is positively related to the reserve capacity of the road network, and the more serious the traffic congestion, the greater the traffic demand multiplier.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U491

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