Simulation and Modelling of Safety of Roadways in Reverse Horizontal Curves (RHCs): With Focus on Lateral Friction Coefficient

Table 4

Model’s coefficients for vehicle’s lateral friction coefficient.

Model		Unstandardized coefficients		Standardized coefficients	t	Sig.
		B	Std. error	Beta
Sedan	(Constant)	0.245	0.003		84.944	0.000
		−0.001	0.000	−0.977	−37.706	0.000
		0.000	0.000	−0.062	−2.672	0.009
	D	8.984E−6	0.000	0.015	.575	0.566
SUV	(Constant)	0.244	0.007	−0.881	37.213	0.000
		−0.001	0.000	−0.058	−16.478	0.000
		0.000	0.000	0.015	−1.203	0.232
	D	1.029E−5	0.000		0.290	0.773
Truck	(Constant)	−0.010	0.006	0.750	−1.736	0.086
		0.001	0.000	0.026	9.805	0.000
		8.661E−5	0.000	−0.064	0.384	0.702
	D	−2.673E−5	0.000		−0.836	0.405
Bus	(Constant)	−0.046	0.003	0.961	−16.758	0.000
		0.001	0.000	0.085	35.162	0.000
		0.037	0.011	0.010	3.463	0.001
	D	5.67E−6	0.000		0.379	0.705

^aDependent variable: f_y.