Predicting Severity and Duration of Road Traffic Accident

Table 3

Estimation results of accident duration model.

Variables	Weibull distribution		Exponential distribution
	Coef.	z-stat.	Coef.	z-stat.
Constant	5.12	13.99	4.71	11.76
Nof	0.51	4.14	0.51	1.43
Noi	0.33	4.45	0.34	1.28
Pd			−0.13	−1.01
Retc	−0.37	−2.62	—	—
Vr	0.28	2.06	—	—
Nolb	0.24	4.48	0.25	1.64
Bi	0.60	4.01	0.41	1.07
Ti	0.58	3.12	—	—
Di	0.55	5.28	0.45	1.35
Hmi	0.88	2.89	—	—
Wof	−0.14	−1.49	—	—
Alv	−0.57	−4.55	−0.43	−1.06
Nol	−0.18	−2.81	—	—
Ts	0.38	1.35	—	—
𝛾 (shape parameter)	0.26	—	—	—
Prob >𝜒^2	0		0.0067