Crash Risk Prediction Model of Lane-Change Behavior on Approaching Intersections

Table 13

Parameter estimates.

Risk level	Variables	B	Std.; Err.	Wald	df	Sig.	Exp (B)	95% confidence interval for Exp (B)
								Lower bound	Upper bound
2	Intercept	.706	.705	1.003	1	.317
	X1	−.003	.003	.631	1	.427	.997	.991	1.004
	X2	−.013	.040	.100	1	.752	.987	.913	1.068
	X3	−.065	.013	26.615	1	.000	.937	.914	.960
	X4	−.097	.069	1.937	1	.164	.908	.792	1.040
	X5
	1	1.079	.376	8.225	1	.004	2.942	1.407	6.150
	2	.507	.394	1.653	1	.199	1.660	.767	3.593
	3	0	.		0	.	.	.	.
	X6
	0	.105	.221	.226	1	.634	1.111	.720	1.714
	1	0	.	.	0	.	.	.	.
3	Intercept	1.770	1.265	1.957	1	.162
	X1	−.006	.005	1.228	1	.268	.994	.984	1.004
	X2	.197	.065	9.147	1	.002	1.217	1.072	1.383
	X3	−.627	.075	70.428	1	.000	.534	.461	.618
	X4	−.075	.127	.350	1	.554	.928	.724	1.189
	X5
	1	2.089	.657	10.114	1	.001	8.075	2.229	29.256
	2	.363	.718	.256	1	.613	1.438	.352	5.868
	3	0	.		0	.	.	.	.
	X6
	0	−.210	.379	.306	1	.580	.811	.386	1.705
	1	0	.	.	0	.	.	.	.
4	Intercept	4.537	1.354	11.232	1	.001
	X1	−.011	.006	4.122	1	.042	.989	.978	1.000
	X2	.159	.073	4.723	1	.030	1.172	1.016	1.352
	X3	−1.158	.117	97.240	1	.000	.314	.250	.395
	X4	−.015	.153	.010	1	.922	.985	.730	1.330
	X5
	1	2.177	.733	8.831	1	.003	8.820	2.098	37.069
	2	−.960	.865	1.233	1	.267	.383	.070	2.085
	3	0	.	.	0	.	.	.	.
	X6
	0	−.387	.414	.874	1	.350	.679	.302	1.528
	1	0	.	.	0	.	.	.	.

Note. The reference category is 1; this parameter is set to zero because it is redundant.