基于速度截断分布和流量的车队离散模型  

Platoon Flow Dispersion Model Based on Truncated Normal Distribution of Speed

作　　者：巫威眺[1] 沈旅欧[1] 靳文舟[1] 

机构地区：[1]华南理工大学土木与交通学院,广东广州510641

出　　处：《西南交通大学学报》2014年第1期126-133,共8页Journal of Southwest Jiaotong University

基　　金：国家自然科学基金资助项目(61174188)

摘　　要：为解决Pacey模型中车速分布假设与实际不符的问题,假设车速服从在最小速度和最大速度之间的截断正态分布,利用分段函数构造了车队到达下游交叉口的流量分布函数,建立了基于交通流量的车队离散模型,研究了下游交叉口流量与上游交叉口断面离去流量之间的关系.以相邻交叉口实测数据为例分析车队流量分布模式,研究结果表明,与Robertson流量模型相比,本文提出的速度截断正态分布更符合实际情况;本文模型能更精确地描述车队流量通过下游交叉口的变化趋势,确保流量守恒.In order to overcome the defect in Pacey＇s platoon dispersion model that the speed distribution assumption does not conform to the field situation, a platoon dispersion model based on flow patterns was established to study the relationship between the arriving flow distribution at the downstream intersection and the departing flow distribution at the upstream intersection. In this model, vehicle speeds are assumed to follow a truncated normal distribution, ranging from minimum to maximum speed; and a piecewise function was used to construct the arriving flow distribution function at downstream intersections. The platoon flow distribution mode was investigated using the field collected data between two adjacent intersections. The results show that compared with the Robertson model, the proposed truncated normal distribution of speed is more consistent with the actual situation, and that the proposed model can precisely describe the change trend of the platoon flow passing the downstream intersection and ensure the flow conservation.

关 键 词：交通流 车队离散模型 截断正态分布 信号协调控制 

分 类 号：U491[交通运输工程—交通运输规划与管理]