Table A3.

Z-Test for unsafe behaviors and type and severity of traffic accidents considering age and invalid driving license.

Objective Variables		Age	P1	P2	ΔP	Z
Unsafe behaviors of drivers	Right-of-way violations	<25	0.278	0.284	0.006	−3.132 **
		25 ≤ Y ≤ 40	0.278	0.284	0.006	−4.929 **
		40 < Y ≤ 60	0.278	0.275	−0.003	1.966 **
		Y > 60	0.278	0.299	0.021	−9.773 **
		Unknown	0.278	0.085	−0.193	62.847 **
	Speed infringement	<25	0.124	0.216	0.092	−53.807 **
		25 ≤ Y ≤ 40	0.124	0.134	0.011	−11.124 **
		40 < Y ≤ 60	0.124	0.094	−0.030	34.413 **
		Y > 60	0.124	0.078	−0.046	35.831 **
		Unknown	0.124	0.035	−0.088	43.019 **
	Other infringements	<25	0.004	0.004	0.001	−1.789
		25 ≤ Y ≤ 40	0.004	0.004	0.000	−0.569
		40 < Y ≤ 60	0.004	0.004	0.000	0
		Y > 60	0.004	0.004	0.000	0
		Unknown	0.004	0.002	−0.002	4.840 **
	Technology-based distractions	<25	0.004	0.005	0.001	−2.015 **
		25 ≤ Y ≤ 40	0.004	0.005	0.000	−0.536
		40 < Y ≤ 60	0.004	0.004	0.000	0.536
		Y >60	0.004	0.005	0.000	−0.949
		Unknown	0.004	0.001	−0.003	9.574 **
	Other distractions	<25	0.106	0.109	0.003	−2.272 **
		25 ≤ Y ≤ 40	0.106	0.108	0.002	−2.316 **
		40 < Y ≤ 60	0.106	0.105	−0.001	1.148
		Y > 60	0.106	0.116	0.010	−6.902 **
		Unknown	0.106	0.025	−0.081	46.232 **
Traffic accident severity	Serious injury or death	<25	0.171	0.191	0.020	−11.963 **
		25 ≤ Y ≤ 40	0.171	0.175	0.004	−3.682 **
		40 < Y ≤ 60	0.171	0.168	−0.004	3.286 **
		Y > 60	0.171	0.165	−0.006	3.420 **
		Unknown	0.171	0.064	−0.107	39.795 **
Traffic accident type	Collision	<25	0.736	0.718	−0.018	9.224 **
		25 ≤ Y ≤ 40	0.736	0.733	−0.003	2.106 **
		40 < Y ≤ 60	0.736	0.739	0.003	−2.239 **
		Y > 60	0.736	0.757	0.021	−10.578 **
		Unknown	0.736	0.735	−0.001	0.125
	Run over	<25	0.091	0.083	−0.008	6.519 **
		25 ≤ Y ≤ 40	0.091	0.090	−0.001	1.750
		40 < Y ≤ 60	0.091	0.093	0.002	−2.426 **
		Y > 60	0.091	0.097	0.006	−4.025 **
		Unknown	0.091	0.108	0.017	−4.942 **
	Others	<25	0.173	0.1983	0.025	−14.835 **
		25 ≤ Y ≤ 40	0.173	0.1770	0.004	−3.478 **
		40< Y ≤60	0.173	0.1682	−0.005	4.779 **
		Y > 60	0.173	0.147	−0.027	16.224 **
		Unknown	0.173	0.157	−0.017	4.157 **

Z-Values highlighted with asterisks, **, are statistically significant differences at a 95% confidence level.