Pedestrian crossing decision during flashing green-countdown signal for urban signalized intersection

IF 2.4 3区 工程技术 Q3 TRANSPORTATION
Xueqin Long, Meng Zhou, Huan Zhao, Ya’nan Song
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引用次数: 3

Abstract

Abstract During the signal-transition period for the signalized intersection, pedestrians will face a dilemma of whether to cross or wait. The study establishes a decision model of pedestrian-crossing based on risk-cost and time-utility during flashing green-countdown signal. First, the calculation methods of potential and direct risk in each direction of the intersection are proposed according to the traffic operation status. Then, analyze the relationship among the arrival time, remaining duration of flashing green signal and the actual crossing behavior, pedestrians are divided into adventurous, ordinary and conservative types respectively. Finally, introducing the time utility function, crossing decision models of three types pedestrians are established respectively based on comparing the risk cost and time utility. Take two signalized intersections as examples, parameters of decision models are calibrated through field investigation. Three types of models’ accuracy rates for the adventurous, ordinary and conservative pedestrians are 80%, 90% and 60% respectively, which denotes that the models can accurately predict the decision behavior of adventurous and ordinary pedestrians. Additionally, pedestrians are less sensitive to risk and more sensitive to time when they are faced with urgent time.
摘要在信号交叉口的信号转换阶段,行人面临着“是过马路还是等待”的两难选择。建立了绿灯倒计时信号闪烁时行人过街的风险成本和时间效用决策模型。首先,根据交叉口的交通运行状况,提出交叉口各方向潜在风险和直接风险的计算方法;然后,分析行人到达时间、绿灯闪烁剩余时间与实际过马路行为的关系,将行人分为冒险型、普通型和保守型。最后,引入时间效用函数,在比较风险成本和时间效用的基础上,分别建立了三类行人的过马路决策模型。以两个信号交叉口为例,通过实地调研对决策模型参数进行了标定。三种模型对冒险型、普通型和保守型行人的准确率分别为80%、90%和60%,表明模型能够准确预测冒险型和普通型行人的决策行为。此外,行人在面对紧急时间时,对风险的敏感度较低,对时间的敏感度较高。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
6.00
自引率
15.40%
发文量
38
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