摘要
为了合理描述信号交叉口车流到达的随机性,以交叉口入口引道车辆到达数实测数据为依据,采用正态分布、对数正态分布、指数分布及5参数Wakeby分布对实测数据进行了拟合,研究不同分布的参数估计方法和拟合优度的检验方法。研究结果表明:与其他分布相比,5参数Wakeby分布对不同方向、不同时段的信控交叉口的到达车流具有较好的拟合效果,拟合接受率为90%。
In order to reasonably describe the randomness of traffic arrivals at signalized intersections,based on the measured data of vehicle arrivals at the entrance crossings of the intersections,the normalized data,normal distribution of logarithms,exponential distribution and Wakeby distribution of 5 parameters were used to simulate the measured data.The methods of parameter estimation with different distributions and the test of goodness of fit were studied.Compared with the other distributions,a better imitative effect on the arrival traffic flow is achieved by using 5-parameter Wakeby for the signalized intersections that have different directions or periods,and the fitting acceptance rate is 90%.
作者
郑慧敏
况爱武
段倩倩
ZHENG Hui-min;KUANG Ai-wu;DUAN Qian-qian(School of Traffic and Transportation Engineering,Changsha University of Science ＆ Technology,Changsha 410114,China)
出处
《交通科学与工程》
2018年第2期91-95,共5页
Journal of Transport Science and Engineering
基金
湖南省科技计划资助项目(2015SK2012)
长沙理工大学道路灾变防治及交通安全教育部工程研究中心开放基金资助项目(kfj130301)
国家自然科学基金项目(51208064)
关键词
信号交叉口
随机车流到达
分布拟合
K-S检验
signalized intersections
stochastic traffic flow arrives
distribution fitting
K-S test
