In this study, a procedure for predicting the number of passes of a wheel load that will cause a specified rut depth is developed, using information which includes the base layer thickness, the resilient moduli and general classification of the granular base course and the subgrade soils. The procedure is mechanistic but simple, and is based on the permanent deformation characteristics of various types of soils determined in the laboratory and also from test results published by other researchers. Resilient moduli of pavement material layers are obtained from the results of non destructive testing techniques. The validity of predictions of a number of these techniques is verified by comparing them with laboratory test results. Parametric runs were made using the Mechano lattice program to form a database of rut depths.