For many years, mathematical models have been employed to simulate pavement response to load, and these models have driven pavement design methods. However, based on the nature of the pavement’s constitutive materials and the complex interaction between the moving vehicle and the pavement, this formidable problem has been approached with many simplifying assumptions. Accordingly, these efforts have yet to result in a model capable of predicting damage accurately. This paper discusses work which implements a micromechanics based theory in an explicit finite element program to represent, for the first time, the response of pavement under cyclic loading. This micromechanics based approach is able to capture the complex nature of the pavement’s concrete material which includes such aspects as heterogeneity and nonlinear stress strain behavior. The Taguchi Method is then employed with this developed program to examine the critical design parameters, and the combination of these two methods provides a novel unified approach to pavement design capable of predicting pavement response under dynamic loading and identifying the sensitive design parameters.