快速路交织区通行能力分析方法研究

发布时间：2018-01-04 12:01

  本文关键词：快速路交织区通行能力分析方法研究　出处：《北京工业大学》2015年硕士论文　论文类型：学位论文

  更多相关文章： 通行能力 速度计算模型 服务水平 交织区 快速路

【摘要】：交织区是快速路系统中重要的道路基础设施,供车辆转换行驶道路使用。由于交织区通行能力常比快速路基本路段通行能力小,时常引发交通拥堵,导致交织区甚至是整个快速路系统的服务水平降低。为了更准确地评价交织区服务水平、合理设计交织区几何构型,提高快速路系统的运行效率和安全水平,本文展开快速路交织区通行能力分析方法研究。论文通过总结我国常用的通行能力分析方法,定性分析了交织区通行能力分析方法的发展脉络;以天津实测数据为基础,测算了我国“九五”公路通行能力分析指南、“十五”公路通行能力分析指南、《公路通行能力手册》及美国2010版《道路通行能力手册》中交织区通行能力分析方法,定量对比了以上方法的准确性、适应性、计算便捷性和操作难易度等方面,推荐了快速路交织区通行能力分析方法。尽管HCM2010手册交织区通行能力分析方法突破了原来物理长度的限制,给出通行能力计算模型,且分析逻辑性强、自由度高、模型物理意义明确,具有较高的应用价值。在利用该模型计算速度时发现,由于预测模型中缺少交通流量参数,导致交织速度预测值往往大于非交织速度预测值,有悖于交织区交通流运行特性。基于此,论文增加了交通流量的影响,改进了快速路交织区速度预测模型,利用实测数据对改进模型进行了标定与验证,表明该模型具有更好的预测精度。考虑到快速路交织区交通流在高流量状态下,速度对流量变化的敏感性减弱,服务水平评价指标由速度变化为密度。在实际评价过程中,密度指标难以测量。因此,论文分析了不同密度条件下负荷度分布状态,发现在交织区交通流运行过程中,相同密度对应了多个负荷度,且相同负荷度亦对应多种交通密度状态,说明利用单一指标刻画交织区服务水平存在困难。论文提出以负荷度作为主要指标、密度作为次要指标,进一步明确了交织区服务水平的分级标准。
[Abstract]:Interleaved area is an important road infrastructure in expressway system, which can be used by vehicles to switch roads. Because the capacity of interleaved area is often smaller than that of the basic section of expressway, traffic congestion is often caused. In order to evaluate the service level of interleaving area more accurately, the geometric configuration of interleaving area is designed reasonably, and the operation efficiency and safety level of expressway system are improved. Through summarizing the common methods of capacity analysis in China, this paper qualitatively analyzes the development of interleaving capacity analysis method. Based on the measured data of Tianjin, this paper calculates the analysis guide of highway capacity in the Ninth Five-Year Plan and the Analysis Guide of Highway capacity of 15 in China. The method of analyzing the capacity of interlaced areas in the "Highway capacity Manual" and the 2010 edition of the United States "Road capacity Manual" has been compared quantitatively with the accuracy and adaptability of the above methods. In terms of calculation convenience and ease of operation, the method of capacity analysis of expressway interleaved area is recommended, although the method of interleaving area capacity analysis of HCM2010 manual breaks through the limit of physical length. The calculation model of capacity is given, and the analysis is logical, the degree of freedom is high, the physical meaning of the model is clear, and the model has higher application value. Due to the lack of traffic flow parameters in the prediction model, the interleaved velocity prediction value is often larger than the non-interleaved velocity prediction value, which is contrary to the traffic flow characteristics in the interleaved area. Therefore, the paper increases the influence of traffic flow. The speed prediction model of the interleaving zone of expressway is improved, and the improved model is calibrated and verified by the measured data. It shows that the model has better prediction accuracy, considering that the sensitivity of speed to flow change is weakened under the condition of high traffic flow in the interleaved area of expressway. The service level evaluation index changes from the speed to the density. In the actual evaluation process, the density index is difficult to measure. Therefore, the paper analyzes the load distribution state under different density conditions. It is found that the same density corresponds to multiple load degrees and the same load degree corresponds to a variety of traffic density states during the operation of traffic flow in interlaced areas. It is difficult to use a single index to describe the service level of interleaved area. This paper proposes that the load degree as the main index and the density as the secondary index, and the classification standard of the service level in the interleaved area is further clarified.
【学位授予单位】：北京工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U491
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本文编号：1378387