Probability of Roadside Accidents for Curved Sections on Highways

Table 2

Description of variables.

Variable		Value
Highway geometric design indexes	Horizontal curve radius (m)	200	300	400	500	600
	Hard shoulder width (m)	0.75	1.5		2.25	3.00
	Longitudinal slope (%)	0	2		4	6
	Superelevation slope (%)	0	2		4	6
	Width value of curve (m)	0.4			0.6
Pavement condition	Adhesion coefficient	0.2	0.4		0.6	0.8
Traffic characteristics	Vehicle type	“Truck” = 0			“Car” = 1
	Vehicle speed (km/h)	40	60	80	100	120
Output variable	Vehicle final state	“No departing from road” = 0			“Departing from road” = 1