基于BPR函数的城市道路间断流动态路阻模型  

Dynamic road resistance model of intermittent flow on urban roads based on BPR function

作　　者：王殿海[1] 胡佑薇 蔡正义[1] 曾佳棋 姚文彬 WANG Dian-hai;HU You-wei;CAI Zheng-yi;ZENG Jia-qi;YAO Wen-bin(Intelligent Transportation Research Institute,Zhejing University,Hangzhou 310058,China)

机构地区：[1]浙江大学智能交通研究所,杭州310058

出　　处：《吉林大学学报（工学版）》2023年第7期1951-1961,共11页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(52072340,71901193,5213000026).

摘　　要：针对BPR函数在过饱和情况下难以应用、不符合城市间断流特性的局限性进行了改进,重新定义交通需求,提出考虑上下游信号配时影响的城市道路间断流动态路阻函数形式。基于VISSIM路段仿真数据,采用SMOTE过采样算法平衡仿真数据集,标定改进路阻函数。研究表明,在BPR函数中加入绿波宽度占比ω、下游研究相位绿信比g_(s)、转向因子变量s_(l),能够同时反映信号配时、交通需求对于行程时间的影响。路段自由流行驶时间并非固定值,而是与ω有关,随着ω的增大,可协调程度增加,路段自由流行驶时间减小。In view of the limitation of BPR(Bereau of Public Roads)function that it is not suitable for oversaturated traffic flow and does not meet the characteristics of urban intermittent flow,some improvements have been made.The paper redefines the traffic demand,and proposes a dynamic resistance function form of urban road intermittent flow that takes into account the influence of upstream and downstream signal timing.Based on the data obtained by VISSIM road section simulation,the SMOTE oversampling algorithm is used to balance the simulation data set,and the improved road resistance function is calibrated.Our research shows that adding three variables which include percentage of green waveω,green split for downstream research phase s_(g),and steering factor s_(l) into the BPR function can simultaneously reflect the influence of signal timing and traffic demand on travel time.In the case of zero traffic flow,the zero-flow travel time is related with the percentage of green waveω.With the increase ofω,the degree of coordination increases,and the zero-flow travel time decreases.

关 键 词：交通运输规划与管理 交通需求 动态路阻 信号配时 协调 行程时间 

分 类 号：U491[交通运输工程—交通运输规划与管理]