Cluster-Based Pavement Deterioration Models for Low-Volume Rural Roads

Table 8

(a) Rating for shape of side drain and (b) rating for the amount of silts and debris.

(a)  

Shape and slope of side drain	Rating
Very good	5
Good	4
Fair	3
Poor	2
Very poor	1

(b)  

Percentage of silts and debris	Rating
Nil	5
1–25%	4
26%–50%	3
51%–75%	2
>75%	1