Mathematical Problems in Engineering

Research Article

The Relationship between Bus Drivers’ Improper Driving Behaviors and Abnormal Vehicle States Based on Advanced Driver Assistance Systems in Naturalistic Driving

Table 2

The Person correlation analysis results among the warning types.


Warning types	Results	Warning types
Warning types	Results	Eye closure	Yawn	Looking away	Lane departure	Rapid acceleration	Rapid deceleration	Forward collision

Eye closure	P.R.	1	0.988	0.944	0.998	0.994	0.994	0.999
	S.		0.000	0.000	0.000	0.000	0.000	0.000
	N	2753	1585	180	1153	760	2316	1052

Yawn	P.R.	0.988	1	0.976	0.991	0.995	0.983	0.989
	S.	0.000		0.000	0.000	0.000	0.000	0.000
	N	1585	1585	180	1153	760	1585	1052

Looking away	P.R.	0.944	0.976	1	0.991	0.994	0.981	0.982
	S.	0.000	0.000		0.000	0.000	0.000	0.000
	N	180	180	180	180	180	180	180

Lane departure	P.R.	0.998	0.991	0.991	1	0.997	0.996	0.999
	S.	0.000	0.000	0.000		0.000	0.000	0.000
	N	1153	1153	180	1153	760	1153	1052

Rapid acceleration	P.R.	0.994	0.995	0.994	0.997	1	0.993	0.992
	S.	0.000	0.000	0.000	0.000		0.000	0.000
	N	760	760	180	760	760	760	760

Rapid deceleration	P.R.	0.994	0.983	0.981	0.996	0.993	1	0.998
	S.	0.000	0.000	0.000	0.000	0.000		0.000
	N	2316	1585	180	1153	760	2316	1052

Forward collision	P.R.	0.999	0.989	0.982	0.999	0.992	0.998	1
	S.	0.000	0.000	0.000	0.000	0.000	0.000
	N	1052	1052	180	1052	760	1052	1052

P.R. is Pearson correlation; S. denotes significant (two-tailed); N denotes the degree of freedom; indicates that the correlation is significant at a significance level (double test) less than 0.01.