Effect of the Dynamic Load on Stresses in a Deck Pavement with an Interlayer Contact Model

Table 2

Estimation scale of surface roughness condition of bridge deck pavement.

Condition	Very good	Good	Average	Poor	Very poor
IRI value	0	2	4 or 6	8	10

IRI = 0 means an absolutely smooth longitudinal surface; IRI = 2 means a good surface condition; IRI = 6 means a moderately rough surface; IRI = 10 means a highly rough surface.