Safety Evaluation for Highway Geometric Design Based on Spatial Path Properties

Table 4

Results of the correlation analysis of crash rate, curvature difference, and torsion difference.

	Crash rate	Curvature difference	Torsion difference
Crashes per million vehicle-kilometers	1	0.607^∗∗	0.533^∗∗
Curvature difference of adjacent segments	0.607^∗∗	1	0.601^∗∗
Torsion difference of adjacent segments	0.533^∗∗	0.601^∗∗	1

^∗ p < 0.05, ^∗∗p < 0.01.