Safety Effects of Horizontal Curve Design and Lane and Shoulder Width on Single Motorcycle Accidents in Norway

Table 2

Descriptive statistics on horizontal alignment.

Horizontal alignment categories		Number of segments	% of segments	% of total length
Curve type	Multiple curves in opposite direction	17,921	30.47	34.82
	Multiple curves in the same direction	6604	11.23	10.33
	Single	4925	8.37	6.18
	Straight	29,365	49.93	48.67
Degree of curvature	High (R < 200 m)	4641	7.89	7.22
	Low (R > 200 m)	24,809	42.18	44.11
	Straight	29,365	49.93	48.67
Neighbor curves	NOT OK	13,252	22.53	27.91
	OK	11,273	19.17	17.24
	Single	4925	8.37	6.18
	Straight	29,365	49.93	48.67