Research on risk perception tendency of drivers based on multi-class Adaboost algorithm

doi:10.16265/j.cnki.issn1003-3033.2022.04.021

Abstract

Abstract:

In order to prevent and reduce road traffic accidents, multi-class Adaboost SAMME algorithm was applied to identify risk perception tendency of different drivers. Firstly, perception utility of 56 drivers was quantified based on traffic conflict analysis method. Then, drivers' behavior characterization parameters in 6 risky situations were obtained through KMRTDS driving simulator. Finally, linear discriminant analysis (LDA) and Adaboost SAMME algorithm were employed to gradually construct a classification and prediction model for drivers' risk perception tendency based on driving behavior data, and k-fold cross-validation method was adopted to evaluate the model's effectiveness. The results show that the accuracy of proposed model is up to 92.9%, and it can effectively identify risk perception tendency of different drivers which are divided into three risk perception types, namely safe type, radical type, and compound type.

Key words: Adaboost SAMME algorithm, drivers, risk perception tendency, driving behavior, driving simulator

QIN Yaqin, LI Qiugu, ZHAO Pengyan, BAO Fawang, XIE Jiming. Research on risk perception tendency of drivers based on multi-class Adaboost algorithm[J]. China Safety Science Journal, 2022, 32(4): 141-147.

Figures/Tables 15

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Fig.1

Tab.2

Fig.2

Tab.3

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Fig.4

Tab.4

Data of driving behaviors and characteristic quantity

类别	驾驶行为数据名称	特征量
驾驶操作数据	油门踏板位移A/mm	$A ¯ 、 S A 、 A m a x 、 A m i n$
	制动踏板位移B/mm	$B ¯ 、 S B 、 B m a x$
	方向盘转角 $α$ /(°)	$α ¯ 、 S α 、 α m a x 、 α m i n$
纵向运行数据	纵向加速度 $β$ / (m·s^-2)	$β ¯ 、 S β 、 β m a x$ 、β_min
	纵向速度 $λ$ / (km·h^-1)	$λ ¯$ 、S_λ、λ_max、 $λ m i n$
	侧向加速度μ/ (m·s^-2)	$μ ¯$ 、S_μ、μ_max、 $μ m i n$
	侧向速度 $θ$ / (km·h^-1)	$θ ¯$ 、S_θ、θ_max、 $θ m i n$
横向运行数据	横向位移 $τ$ /m	$τ ¯$ 、S_ω、τ_max、 $τ m i n$

Tab.4

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Fig.8

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个人信息	驾驶背景	人数	占比/%	均值	标准差
性别	男	40	65.6	—	—
性别	女	21	34.4	—	—
年龄/ 岁	18~24	13	21.3	29.84	7.80
	25~40	40	65.6
	>40	8	13.1
驾龄/ a	<2	17	27.9	5.22	4.65
	2~10	37	60.7
	>10	7	11.4

情境编号	情境描述	冲突类型
1	主车准备直行通过无信号控制十字平面交叉口(以下简称平交口)时,有一行人准备横穿马路	机-人
2	主车准备右转通过平交口时,主车右后侧有一摩托车准备超越主车直行通过平交口,同时主车左前方有一辆卡车准备直行通过平交口	机-非机、机- 机
3	对向车道发生堵塞,主车正要直行通过平交口时,在主车左前方有一辆自行车突然从车流中窜出	机- 非机
4	主车准备右转通过平交口时,前方突然滚出一个皮球,然后在主车右前方有一小孩窜出捡球	机-人
5	主车准备左转通过平交口时,主车左前方有一辆卡车直行通过平交口,同时对向车道有一辆小汽车直行通过平交口	机-机
6	主车准备直行通过无信号平交口时,右前方有一辆车右转通过平交口	机-机

情境编号	1	2	3	4	5	6
客观情境风险度	0.10	0.38	1.30	0.90	0.30	0.74
风险等级	低	低	高	中	低	中

函数	特征值	方差占比/%	累计占比/%	典型相关性
F₁	1.988	63.7	63.7	0.816
F₂	1.135	36.3	100.0	0.729

函数检验	威尔克Lambda	卡方	自由度	显著性
F₁-F₂	0.157	70.419	62	0.217
F₂	0.468	28.826	30	0.527