/ / / Tab 5

Research Article

Probability of Roadside Accidents for Curved Sections on Highways

Table 5

The magnitude of the impact of factors on roadside accidents.


Variable	Direct effect	Indirect effect
Variable	Direct effect	Vehicle speed	Horizontal curve radius	Adhesion coefficient	Hard shoulder width	Longitudinal slope	Vehicle type	Overall effect

Vehicle speed	3.321	—	2.292	0.508	0.484	0.461	0.684	7.749
Horizontal curve radius	−2.572	−2.960	—	−0.501	−0.477	−0.456	−0.679	−7.644
Adhesion coefficient	−0.827	−2.040	−1.559	—	−0.323	−0.305	−0.443	−5.496
Hard shoulder width	−0.812	−1.979	−1.510	−0.329	—	−0.300	−0.443	−5.373
Longitudinal slope	0.314	1.066	1.007	0.124	0.013	—	0.083	2.607
Vehicle type	−1.005	−2.272	−1.746	−0.366	−0.360	−0.341	—	−6.086

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