多信号交叉口干线行程时间特性分析

城市道路多信号交叉口影响下的行程时间分布及可靠性是交通流理论研究中的重要方向 之一。本文基于灰色关联理论建立信号协调控制下的多信号交叉口行程时间影响因素模型。首 先，对车牌识别数据进行预处理，得到路段和干线行程时间数据；然后，利用Burr分布和高斯混合 模型对数据进行分布拟合，并进行拟合优度检验；最后，利用灰色关联法分析交叉口数量、干线长 度和干线流量与行程时间特性之间的关联关系。结果表明，单路段行程时间分布具有明显的双 峰现象，高斯混合模型适用于单路段行程时间的拟合；而Burr分布可以较好地描述多信号交叉口 干线行程时间分布右偏和高峰值的特征。交叉口数量、干线长度和干线流量与行程时间特性之 间有较强的相关性，且干线长度的影响更为显著，随着干线长度的增加，行程时间趋于一个稳定 的单峰分布，波动性减小，可靠性增加。

Travel Time Characteristics Analysis of Arterial Roads with Multiple Signalized Intersections

The travel time distribution and reliability characteristics of urban arterial roads with multiple signalized intersections are one of the important branches of traffic flow theory. Based on the grey relational analysis, this paper establishes a model of travel time influencing factors of multiple signalized intersections under signal coordination control. Firstly, the automatic number plate recognition (ANPR) data is preprocessed to get travel time data; then, the Burr distribution and the Gaussian mixture model are used to fit the travel time distribution and conduct goodness of fit test; finally, the grey correlation method is used to analyze the relationship between the number of signalized intersections, route length, route traffic flow and the travel time characteristics. The results show that the link travel time distribution is bimodal, and the Gaussian mixture model is suitable for the fitting of link travel time; the Burr distribution can better describe the characteristics of right deviation of the arterial roads with multiple signalized intersections. There is a certain correlation between the number of signalized intersections, route length, route traffic flow and travel time characteristics, and the influence of the route length is more significant. With the increase of route length, the travel time tends to a stable unimodal distribution, and the fluctuation decreases and the reliability increases.