Study on the Technical Status of Old Concrete Truss-Arch Bridge Based on Vehicle-Bridge Interaction

Table 7

Roughness coefficient for different surface conditions.

Condition	Roughness coefficient a(10^−6)	Condition
“Very good”	0∼2	“Very good”
“Good”	2∼8	“Good”
“Average”	8∼32	“Average”
“Poor”	32∼128	“Poor”