文档介绍：
一种快速路宏观交通流模型的标定方法#
张硕,孙剑**
(同济大学道路与交通工程教育部重点实验室,上海 201804)
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摘要:本文首先回顾了快速路宏观交通流模型的研究现状,并结合我国的快速路交通流特性
选择经典的模型进行标定研究:首先对研究路段进行单元划分,确定模型的初始参
数值和各单元待标定参数,然后利用非线性最小二乘拟合方法对各标定单元关键参数进行标
定,接着根据各标定单元参数的物理意义和标定结果选择最终的路网参数组合方案。最后本
文以上海市内环广中路瓶颈段利用实时检测数据对模型进行在线仿真标定。结果表明,在 1
分钟为单位的高频统计间隔下,标定后模型速度平均绝对相对误差为 15%,绝对相对误差为
20%,该模型参数组合基本能满足宏观快速路交通管理的需求。
关键词:交通运输系统工程;交通流模型;模型参数标定;非线性最小二乘拟合
中图分类号:
A calibration method for macroscopic traffic flow model on
expressway
ZHANG Shuo, SUN Jian
(Key Laboratory of Road and Traffic Engineering, Ministry of Education, Tongji University,
ShangHai 201804)
Abstract: The studies of macroscopic traffic flow model on expressway were reviewed and a
calibration method was proposed by selecting the classic model based on the
characteristics of expressway at Shanghai. Firstly, the research expressway segment was divided
into several cells, and the initial model parameter values were determined and the key parameters
to be calibrated of all cells were the nonlinear least square method is used to
calibrate the key paramerters. After that, the final integrated parameter results were selected
according to the practical significance of parameters and the calibration , a case
study of a bottleneck at Guangzhong segment of Shanghai Inner-ring expressway was conducted
to demonstrate the accuracy of the calibrated results showed that, after the
implementation of the calbration method, the average MARE of speed is 15%,the maximum
MARE of speed is 20% in 1 minute statistics inteval and the integrated parameters result of the
model can meet the demand of macroscopic expressway traffic management.
Keywords: transportation systems engineering; traffic flow model; model parameter calibration;
the nonlinear least square method
0 引言
交通流仿真是再现交通流运行规律,对交通系统进行管理、控制和优化的重要实验手段
和工具。随着我国急速的城市化和机动化进程,城市快速路交通拥挤越来越严重,而理解快
速路交通流特性是解析快速路交通运行规律的基础,因此对快速路交通流模型进行研究成为
极为迫切的课题