Traffic Class

0.01

0.03

0.1

0.3

0.7

1

MISA range

0.003 - 0.01

0.01 - 0.03

0.03 - 0.10

0.1 - 0.3

0.3 - 0.7

0.7 - 1.0

0 - 150 mm Base

DN ≤ 8

DN ≤ 5.9

DN ≤ 4

DN ≤ 3.2

DN ≤ 2.6

DN ≤ 2.5

≥98% Mod. AASHTO

150-300 mm Sub-base

DN ≤ 19

DN ≤ 14

DN ≤ 9

DN ≤ 6

DN ≤ 4.6

DN ≤ 4.0

≥95% Mod. AASHTO

300 - 450 mm Subgrade

DN ≤ 33

DN ≤ 25

DN ≤ 19

DN ≤ 12

DN ≤ 8

DN ≤ 6

≥95% Mod. AASHTO

450 - 600 mm

DN ≤ 40

DN ≤ 33

DN ≤ 25

DN ≤ 19

DN ≤ 14

DN ≤ 13

In situ material

600 - 800 mm

DN ≤ 50

DN ≤ 40

DN ≤ 39

DN ≤ 25

DN ≤ 24

DN ≤ 23

In situ material

DSN₈₀₀

≥39

≥52

≥73

≥100

≥128

≥143