基于出行效用无差异阈值的组合交通客流分配模型  

Passenger flow distribution model for combined transportation modes based on travel utility indifference threshold

作　　者：于晓桦 刘欣萍 毕亚茹 田雨晗 YU Xiao-hua;LIU Xin-ping;BI Ya-ru;TIAN Yu-han(School of Transportation Engineering,Shandong Jianzhu University,Jinan 250101,China)

机构地区：[1]山东建筑大学,交通工程学院,济南250101

出　　处：《交通运输工程与信息学报》2023年第4期25-34,共10页Journal of Transportation Engineering and Information

基　　金：山东省自然科学基金项目(ZR2021MG032)。

摘　　要：为探究出行者的感知差异对组合交通方式客流分担的影响,将出行效用无差异阈值引入出行者的决策过程中,建立了NestedLogit客流分配模型。模型将出行决策过程划分为三个层级,出行逻辑为出行者先选择出行方式,其次考虑换乘位置,最后考虑路径选择。模型确定各层级出行效用的影响因素,并假设当两种出行方案的效用差小于出行者感知的无差异阈值时,出行者无法在两种选择方案中做出确定的选择,而是基于个人偏好或随机进行选择;反之,出行者会选择效用最大的出行方案。通过连续平均算法对模型进行求解,并采用数值算例分析无差异阈值对出行决策过程中三个选择环节的影响,从而验证了模型的合理性。模型结果表明:考虑出行效用无差异阈值的客流分配模型会影响组合交通方式的选择分担,可以更准确地反映出行选择过程中的随机性。此外,模型下级的无差异阈值会影响上级的选择概率,对换乘点与路径信息采取措施可以在一定范围内优化各交通方式的分担比率,从而引导出行者选择更为绿色的出行方式。To explore the impact of travelers’perception differences on the passenger flow distribu-tion for combined transportation modes,a travel utility indifference threshold is introduced into the travelers’decision-making process,and a nested logit passenger flow distribution model is estab-lished.The model divides the decision-making process into three levels.Travelers first choose the travel mode,then consider the transfer position,and finally consider the path choice.The factors af-fecting the utility of each level of travel are determined.The model assumes that when the utility dif-ference of two travel schemes is smaller than the traveler’s perceived indifference threshold,the trav-eler cannot make a definite choice between two alternatives and will make a random choice based on personal preference.Instead,travelers will select the most effective travel plan.An algorithm based on the method of successive algorithm is proposed to solve the model,and a numerical example is used to analyze the influence of the indifference threshold on the three selection links in the travel de-cision-making process and verify the rationality of the model.The model results indicate that the pas-senger flow distribution model considering the travel utility indifference threshold affects the choice sharing of combined transportation modes and can well reflect the randomness in the process of trav-el selection.In addition,the indifference threshold of the lower level of the model affects the selec-tion probability of the upper level.By taking measures based on the transfer point and path informa-tion,the distribution of various transportation modes can be optimized within a certain range,and travelers can be guided to select more ecofriendly travel modes.

关 键 词：城市交通 交通分配 无差异阈值 组合出行 多级网络 

分 类 号：U121[交通运输工程]