The FWD is a non-destructive testing (NDT) equipment that provides realistic deflection basin parameters, which can be used as an input into a mechanistic pavement model to quickly and adequately determine the structural condition of the pavement FWD/HWD equipment applies a load to the pavement and measuring the resulting maximum surface deflection. The FWD/HWD results are used to determine the following:

a. Elastic Modulus of Each The Structural Layer
b. Pavement Structural Adequacy