针对以1个周期时长为分析单位、使用HCM2000延误模型推导信号控制交叉口延误的问题,提出推导模型中参数修正的方法,用t检验验证参数提取的精度。对延误提取模型中的饱和度、启动损失时间及交叉口几何修正系数等参数进行分析,采用贝叶斯定理和马尔科夫链蒙特卡罗模拟方法对参数进行修正。结果证明该方法可以提高按照周期提取延误参数的精度。
This paper validates the HCM2000 delay model at the normal traffic condition using 1 cycle as the duration analysis period.The precision of the HCM 2000 delay model is tested using the t-test method.The saturation,geometry parameter and the start-up loss time parameters in the model are analyzed.Bayesian inference and Markov Chain Monte Carlo(MCMC) simulation are used to revise the models parameters.The method can improve the model's precision when using 1 cycle as the duration of analysis period.