Risk Analysis of Vehicle Rear-End Collisions at Intersections

Table 3

Stopping probability models for stop-and-go decision.

Model	Explanatory variable	Coeff.	S.E.	Wald test	df	Sig.	Exp (B)
Category 1: presence of RLC = 1	Potential time (s)	2.445	0.423	33.432	1	0.000	11.528
	Constant	−6.620	1.190	30.946	1	0.000	0.001
Category 2: presence of RLC = 0	Potential time (s)	1.296	0.252	26.473	1	0.000	3.655
	Constant	−6.709	1.093	37.713	1	0.000	0.001
All samples	Potential time (s)	1.183	0.218	69.451	1	0.000	6.129
	Presence of RLC	3.940	0.600	43.094	1	0.000	51.435
	Constant	−8.876	1.003	78.282	1	0.000	0.000

Note: log likelihood (fitting results of model) = 447.892. Hosmer and Lemeshow test of goodness of fit () = 0.329 ( > 0.05 indicates good result). Area under receiver operating curve = 0.979, which gives validity of model with lower bound of 0.968 and the upper bound of 0.990 (95% confidence interval). Percentage correct = 0.923. Coeff. = coefficient; S.E. = standard error; df = degrees of freedom; Sig. = significance. RLC is dummy variable (0 = non-RLC, 1 = RLC).