Driving Comfort Evaluation for Manhole Covers and Pavement around Manholes

Table 4

Computed results and ordered correlation values of grey entropy.

Factors	Grey correlation entropy	Grey entropy correlation degree	Ordered
Driving speed	3.9511324	0.9999718	2
Height difference	3.9507091	0.9998647	3
Longitudinal slope	3.9511341	0.9999723	1
Tire damping coefficient	3.9449697	0.9984121	7
Tire stiffness coefficient	3.9483077	0.9992570	5
Subsidence of manhole	3.9501511	0.9997235	4
Manhole cover stiffness coefficient	3.9453712	0.9985138	6