Pareto efficiency of reliability-based traffic equilibria and risk-taking behavior of travelers
Pareto efficiency of reliability-based traffic equilibria and risk-taking behavior of travelers
复制标题
基于可靠性的交通均衡的帕累托效率与出行者的冒险行为
DOI：
10.1016/j.trb.2013.12.003
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发表时间：
2014
影响因子：
6.8
通讯作者：
Guo Renyong
中科院分区：
文献类型：
--
作者：
Tan Zhijia;Yang Hai;Guo Renyong
本文研究了文献中提出的各种基于可靠性的交通均衡的帕累托效率以及出行者的冒险行为。以行程时间的平均值和标准差(SD)为指标，考察了百分位数行程时间(PTT)、行程时间预算(TTB)、平均超额行程时间(Mett)和二次效用函数(QDF)等可靠性指标。引入向下倾斜的均值-标准差无差异曲线，对旅行者的冒险行为进行几何分析。通过检验基于PTT、TTB、Mett和QDF的交通均衡时均值-SD无差异曲线的曲率，研究了风险厌恶出行者的多样化和暴跌行为。用几种具体的概率分布来解释所得的理论结果。
This paper investigates the Pareto efficiency of the various reliability-based traffic equilibria proposed in the literature and the risk-taking behavior of travelers. Reliability indexes such as the percentile travel time (PTT), travel time budget (TTB), mean excess travel time (METT) and the quadratic disutility function (QDF) are examined in terms of the mean and standard deviation (SD) of travel times. The downward sloping mean-SD indifference curve is introduced to geometrically analyze the risk-taking behavior of travelers. Both the diversifying and plunging behaviors of risk-averse travelers are investigated by examining the curvature of the mean-SD indifference curves at traffic equilibria based on the PTT, TTB, METT and QDF. Several specific probability distributions are adopted to elucidate the theoretical results obtained.