Critical Factors Analysis of Severe Traffic Accidents Based on Bayesian Network in China

Table 4

The weighted grey correlation degree of single-vehicle traffic accidents’ factors.

Categories	Accident index	Number of accidents	Number of deaths	Number of injuries	Mean value
Driver factors	Overspeed	0.788	0.822	0.870	0.827
	Overload	0.663	0.752	0.734	0.716
	Misoperation	0.814	0.735	0.753	0.767
	Driving without license	0.735	0.707	0.723	0.722
Vehicle factors	Poor braking	0.735	0.678	0.754	0.722
	Commuter bus	0.839	0.823	0.848	0.837
	Light track	0.641	0.710	0.720	0.690
	Straight driving	0.691	0.745	0.784	0.740
	Turing	0.827	0.807	0.798	0.811
Road factors	Incomplete safety facility	0.837	0.721	0.733	0.764
	Nonstraight road	0.872	0.857	0.849	0.860
	Slippery pavement	0.827	0.759	0.752	0.780
	Road without physical separation	0.928	0.799	0.798	0.841
Environment factors	Daytime	0.924	0.766	0.757	0.816
	Workday	0.830	0.692	0.717	0.746
	Bad weather	0.723	0.786	0.852	0.787
	Low visibility	0.752	0.775	0.773	0.767