Traffic class

C

B

A

E80 × 10⁶

0.003 - 0.010

0.010 - 0.030

0.030 - 0.100

ADT

50 - 100

100 - 200

200 - 400

Base

DN ≤ 8

DN ≤ 5

DN ≤ 4

150 mm

CBR ≥ 30

CBR ≥ 50

CBR ≥ 70

³98% Mod. AASHTO

(G6)

(G5)

(G4)

Subbase

DN ≤ 19

DN ≤ 14

DN ≤ 9

150 mm

CBR ≥ 10

CBR ≥ 15

CBR ≥ 25

³95% Mod. AASHTO

(G8)

(G7)

(G6)

Upper selected

DN ≤ 33

DN ≤ 25

DN ≤ 19

150 mm

CBR ≥ 5

CBR ≥ 7

CBR ≥ 10

³93% Mod. AASHTO

(G10)

(G9)

(G8)

Lower selected

DN ≤ 48

DN ≤ 33

DN ≤ 25

150 mm

CBR ≥ 3

CBR ≥ 5

CBR ≥ 7

³90% Mod. AASHTO

(G10)

(G10)

(G9)