Journal of Jilin University(Engineering and Technology Edition) ›› 2026, Vol. 56 ›› Issue (8): 2077-2083.doi: 10.13229/j.cnki.jdxbgxb.20250060

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Analysis of correlation between self⁃driving car takeover mode and accident severity

Yi-yong PAN(),Sai-sai YANG   

  1. College of Automotive and Transportation Engineering,Nanjing Forestry University,Nanjing 210037,China
  • Received:2025-01-12 Online:2026-08-01 Published:2026-09-02

Abstract:

In order to investigate the factors influencing the severity of injury in self-driving car accidents, a structural equation model considering mediating effects was constructd to analyze the correlation between the takeover mode of self-driving cars and the severity of accidents. Using the self-driving car accident data in AVOID dataset, 17 influencing factors were selected from four aspects: vehicle characteristics, weather characteristics, road characteristics and collision conditions, and the mediating effect and factor structure analysis were used to explore the influence of each factor on the severity of self-driving accidents. The results show that road type can significantly reduce the severity of self-driving car accidents. Road condition, weather-cloudy, weather-rain, collision-left rear and lighting-daylight indirectly affect the severity of self-driving car accidents through the mediating effect. Among them, road condition can significantly reduce the severity of traffic accidents. Weather-rain significantly increases the severity of traffic accidents of self-driving cars. The takeover mode of the self-driving car when it is involved in a traffic accident has a significant negative effect on accident severity and the two have a complex correlation.

Key words: engineering of communications and transportation system, accident severity, structural equation modelling, self-driving cars, car takeover, mediating effects

CLC Number: 

  • U491

Table 1

Categorical descriptive table"

分类自变量自变量描述频数
车辆特性汽车品牌本田11
通用28
福特31
本田47
捷豹110
斯巴鲁21
特斯拉38
丰田24
其他(宝马/奥迪/奔驰/现代/凯迪拉克/雷克萨斯)82
接管模式ADS模式194
ADAS模式86
人工接管112
车型年份2015~201628
2017~201827
2019~2020119
2021~2022200
其他(2023/未知)8

自动系统

使用年份

少于2年228
2~5年122
5年以上35
其他(未知)7
天气特性14
377
多云27
365
道路特性道路类型高速公路93
交叉路口135
街道102
其他62
路面状况干燥369
湿润23
道路照明白天278
黄昏和黎明15
夜晚99
碰撞状况

碰撞区域

(前方)

73
319

碰撞区域

(左前方)

68
324

碰撞区域

(右前方)

69
323

碰撞区域

(后方)

98
294

碰撞区域

(左后方)

80
312

碰撞区域

(右后方)

89
303

碰撞区域

(左方)

31
361

碰撞区域

(右方)

25
367

Table 2

Structural equation model fitting metrics"

拟合

指标

χ2χ2/dfPTLIRMRAGFI
参考值>0.05>1;<3<0.05>0.9<0.05>0.9
指标值18.9412.7060.0080.5920.0220.922

Table 3

Bootstrap sampling test results"

路径估计值SE

95% BCa

置信区间

P
接管模式→路面状况0.0930.057[0.040, 0.281]0.002
接管模式→天气(多云)0.1280.051[0.080, 0.301]0.000
接管模式→天气(雨)0.0060.088[-0.178, 0.189]0.869
接管模式→碰撞(左后方)0.1050.053[0.006, 0.213]0.026
接管模式→照明(白天)-0.1610.045[-0.239, -0.058]0.000
事故严重程度→接管模式-0.1190.043[-0.179, -0.009]0.034
事故严重程度→街道-0.1910.046[-0.247, -0.062]0.001
事故严重程度→交叉路口-0.2460.040[-0.268, -0.103]0.000

Table 4

Estimation results of structural equation models"

路径估计值SEZP
接管模式→路面状况5.2960.31017.1000.000
接管模式→天气(多云)1.1130.5342.0870.037
接管模式→天气(雨)-4.3840.311-14.0950.000
接管模式→碰撞(左后方)0.4140.1952.1280.033
接管模式→照明(白天)-0.5430.174-3.1210.002
事故严重程度→接管模式-0.1530.077-1.9920.046
事故严重程度→街道-0.7190.226-3.1850.001
事故严重程度→交叉路口-0.7750.218-3.5510.000

Fig.1

Structural equation modelling result path"

Fig.2

Factors affecting the severity of traffic accidents"

Table 5

Results of the mediation effect test"

变量ACMEADEPM
估计值P估计值P估计值P
路面状况-0.030 10.0120.063 10.436-0.911 80.718
天气(多云)-0.031 80.0040.077 20.318-0.699 00.602
天气(雨)-0.026 40.0140.085 80.348-0.444 80.556
碰撞(左后方)-0.012 80.042-0.088 00.0200.126 90.046
照明(白天)0.017 90.0100.035 10.3500.337 40.130
街道-0.021 20.016-0.065 90.0740.243 70.032
交叉路口0.006 00.330-0.122 20.000-0.051 40.330
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