The base course uses ______

The Westergaard equation was modified by ______

What is the maximum fatigue ratio of rigid pavement?

The depth of rutting criterion is obtained by ______

If the flexural strength of a pavement is 45 and it’s stress is 40 then factor of safety is ______

The life span of a rigid pavement depends on ______

The overlay design is laid for a maximum life span of ______

Empirical method is dependent on the strength of _________