考虑交织影响累积效应的交通流模型

Traffic Flow Model Considering Cumulative Effects Caused by Interweaving

依托南京市某交织区路段,从微观方面对交织区车辆跟驰行为和换道行为等运行特征进行分析.在LWR模型与Jiang模型的基础上,分析现有模型的不足.在改进的守恒方程与动力学方程中分别引入不同的驶入与驶出换道影响项,同时针对不同换道方式,对换道敏感系数和模型的边界条件进行设定,并进行差分处理.利用实测数据对模型参数进行标定,并与现有模型进行对比.结果表明:驶入与驶出的交织车流对原车道和目标车道的影响并不相同,并且改进模型与实际交通流吻合度更高,误差更小.

Aiming at an interweaving area in Nanjing,the operational characteristics of the car-following behavior and lane-changing behavior of the interweaving area are analyzed from the microscopic aspect.Firstly,the deficiencies of the existing models are analyzed on the basis of LWR model and the Jiang model.Then,the different lane changing effects of the entry and exit are introduced to improve the conservation equation and dynamic equation.The lane-changing sensitivity coefficient and the boundary condition of the model are set for the different lane changing modes,and differential processing is performed.Finally,the measured data is used to calibrate the model parameters and compare with the existing models.The results show that the entry and exit of the weaving vehicles have different effects on the original and the target lanes,and the improved model has a higher degree of coincidence with the actual traffic flow and less error.