信号交叉口延误对BRT运行时间可靠性影响分析

发布时间：2018-03-17 23:04

本文选题：信号交叉口延误　切入点：BRT　出处：《兰州交通大学》2016年硕士论文　论文类型：学位论文

【摘要】：公交运行时间可靠性是衡量公交运行状况和服务质量的重要指标,BRT与传统公交相比具有快捷、准点和安全的优势,但由于不同时段和路段客流的变化,以及交叉口延误、天气和驾驶员水平等因素的影响,BRT实际运行时间与计划运行时间之间会出现偏差,BRT运行时间可靠性会有一定程度的降低。在所有的影响因素中,信号交叉口延误对BRT运行时间可靠性影响较大。本文回顾了国内外信号交叉口延误和公交运行时间可靠性相关研究的发展历程,根据BRT在信号交叉口的运行特征构建了常规信号交叉口BRT延误模型,依据绿灯延长和绿灯提前启亮两种信号优先控制方式,分析了BRT在信号优先交叉口的延误变化,分别给出了优先相位BRT车辆和非优先相位社会车辆的延误变化模型,使用交叉口的人总延误代替车总延误来分析为BRT提供信号优先后,整个交叉口的延误变化情况。选择BRT站间运行时间可靠性和发车时间可靠性作为评价BRT运行时间可靠性的指标,并建立了这两个可靠性指标的数学模型。由于信号交叉口延误对于BRT的发车时间可靠性没有影响,本文重点分析了信号交叉口延误对BRT站间运行时间可靠性的影响。以兰州市安宁区的BRT为例,调查了BRT在刘家堡与西站之间的运行时间数据和交叉口延误数据,对调查所得的两组数据进行分布拟合,分别选取合适的分布函数,假设BRT站间运行时间和站间信号交叉口延误时间符合所选取的分布,并进行拟合优度检验,结果表明BRT在刘家堡与西站之间的运行时间符合对数正态分布,BRT在这两站之间的信号交叉口延误时间符合正态分布;本文应用蒙特卡罗法从两个分布中进行随机抽样,模拟计算了BRT在刘家堡与西站之间的运行时间可靠性、信号交叉口延误时间可靠性,以及没有信号交叉口延误时间时BRT站间运行时间可靠性。文章最后,假设在刘家堡与西站之间设置若干个信号优先交叉口,模拟计算了BRT在这两个站之间的延误时间分别减少10%、15%、20%、25%、30%时对应的BRT运行时间可靠性,并将结果进行了对比。结论表明,信号交叉口延误对BRT运行时间可靠性有明显的影响。
[Abstract]:The reliability of bus running time is an important index to measure the running condition and service quality of public transport. BRT has the advantages of quickness, punctuality and safety compared with traditional public transport. However, due to the change of passenger flow in different periods and sections of road, and the delay of intersection, BRT has the advantages of speed, punctuality and safety. Factors such as weather and driver level will affect the reliability of BRT running time, and the reliability of BRT running time will decrease to a certain extent. The delay of signalized intersection has a great influence on the reliability of BRT running time. This paper reviews the development of research on the reliability of signalized intersections and bus running time at home and abroad. According to the operation characteristics of BRT in signalized intersection, the BRT delay model of conventional signalized intersection is constructed. According to the two signal priority control modes of green light extension and green light advance, the delay variation of BRT at signal-priority intersection is analyzed. The delay models of BRT vehicles with priority phase and those of social vehicles with non-priority phase are given respectively. The total delay at intersections is used to replace the total delay of vehicles to analyze the signal priority for BRT. The reliability of running time and departure time between BRT stations is selected as the index to evaluate the reliability of BRT running time. The mathematical model of these two reliability indexes is established. Because the delay of signalized intersection has no effect on the reliability of BRT departure time, In this paper, the effect of delay at signalized intersections on the reliability of operation time between BRT stations is analyzed. Taking BRT in Anning District of Lanzhou City as an example, the operation time data and intersections delay data of BRT between Liujiapu and West Railway Station are investigated. The two groups of data obtained from the investigation were distributed and fitted, and the proper distribution function was selected respectively. It was assumed that the running time between BRT stations and the delay time of interstation signal intersection were consistent with the selected distribution, and the goodness of fit test was carried out. The results show that the running time of BRT between Liujiapu and West Railway Station is in accordance with the logarithmic normal distribution and the delay time at the signal intersection between the two stations conforms to the normal distribution, and the Monte Carlo method is used to carry out random sampling from the two distributions. The operation time reliability of BRT between Liujiapu and West Railway Station, the reliability of delay time at signalized intersection, and the reliability of running time between BRT stations without delay time at signalized intersection are simulated and calculated. Assuming that several signal-priority intersections are set up between Liujiabao and West Railway Station, the delay time of BRT between the two stations is simulated and calculated, and the reliability of the corresponding BRT running time is reduced by 10 / 15 / 20 / 25 and 30 / 30, respectively, and the results are compared. The delay of signalized intersection has obvious influence on the reliability of BRT running time.
【学位授予单位】：兰州交通大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U491

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