城市路网畅通可靠性研究及应用

发布时间：2019-02-09 16:37

【摘要】：城市道路网络是城市交通的基础，现代城市道路网络规模越来越庞大、路网结构越来越复杂，人们对出行质量的要求也越来越高，使得路网可靠度的研究越来越受到人们的关注。城市道路网络可靠性是指在规定的条件下和规定的时间内，道路网络所提供的各种服务能够满足出行者出行需求的能力，它是衡量路网运行质量的重要指标之一。进行城市道路网络可靠性研究能够为城市道路交通网络设计人员提供重要的参考价值，具有显著的现实意义，考虑道路交通网络可靠性问题能够帮助交通规划和决策人员制定和决策出更优的道路网络设计方案。本论文在撰写时，广泛阅读了相关研究的文献资料。首先，借鉴国内外对路网可靠性相关指标的研究，，通过对交通供需随机性的分析，建立了畅通可靠度这一概率性指标，用于更好的评价城市道路交通网络的运行状态。以此为基础，借鉴一般网络系统可靠性原理，提出了道路单元（包括交叉口和路段）、始终点（即OD对）及整个道路网络系统畅通可靠度分析方法,并考虑了单元阻塞相关性对路网畅通可靠度的影响及单元重要度分析的重要性，在文章最后用一个小型测试网络验证了其可行性。其次，通过对目前国内外在道路网络设计研究方面的分析，总结了研究中存在的不足，提出将路网畅通可靠性应用到道路网络设计中，以改善路网的拥堵状态，提高网络系统的可靠性能，针对此建立了基于畅通可靠性的双向道路网络优化设计双层规划模型，该模型上层以城市路网畅通可靠度最大化为目标，下层以固定需求的UE配流模型为基础，通过交通流分配，车道调整达到提高路网畅通可靠度、优化路网的要求。文中最后结合一个算例分析了双层规划模型的实现过程，验证了模型与方法的有效性，得出了一些新的结论，为开展下一步的研究工作打下了基础。
[Abstract]:Urban road network is the basis of urban traffic. The scale of modern urban road network is becoming larger and larger, the road network structure is becoming more and more complex, and the demand for travel quality is becoming higher and higher. The research of road network reliability has attracted more and more attention. The reliability of urban road network refers to the ability of various services provided by the road network to meet the travel demand of travelers under the prescribed conditions and within a specified time. It is one of the important indicators to measure the quality of road network operation. The research on the reliability of urban road network can provide important reference value for the designers of urban road traffic network. Considering the reliability of road traffic network can help traffic planning and decision makers to formulate and make better road network design scheme. At the time of writing, the literature of related research has been read extensively. Firstly, by analyzing the randomness of traffic supply and demand, the probabilistic index of unblocked reliability is established to evaluate the running state of urban road traffic network better by referring to the research on the reliability index of road network at home and abroad and by analyzing the randomness of traffic supply and demand. Based on this, and referring to the reliability principle of general network system, this paper puts forward a method of analyzing the unblocked reliability of road unit (including intersection and section), always point (i.e. OD pair) and the whole road network system. The influence of unit congestion correlation on the unblocked reliability of road network and the importance of unit importance analysis are considered. At the end of this paper, a small test network is used to verify its feasibility. Secondly, based on the analysis of the research on road network design at home and abroad, this paper summarizes the shortcomings of the research, and proposes to apply the unblocked reliability of road network to the design of road network, in order to improve the congestion state of road network. To improve the reliability performance of the network system, a bi-directional road network optimization design bilevel programming model based on unblocked reliability is established. The upper level of the model aims at maximizing the unblocked reliability of the urban road network. The lower layer is based on the UE model of fixed demand. Through the traffic flow allocation, the lane adjustment can improve the reliability of the road network and optimize the road network. Finally, the realization process of the bilevel programming model is analyzed with an example, the validity of the model and method is verified, and some new conclusions are obtained, which lays a foundation for further research work.
【学位授予单位】：兰州交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U491

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