With the advent of electronic circuits, automation and hand held devices have become quite common in the life of mankind. Also, to reduce consumption of fossil fuels policy decisions are made wherein electric vehicles ply on the road by 2030. This increasing demand of energy has led to the development of sustainable and even low energy producing sources. In this paper, use of piezoelectric crystals for generation of electricity from pavement systems is discussed. Movement of vehicles on roads impart mechanical energy and piezoelectric crystals have been used to convert this mechanical energy to electrical energy. Using PZT rods, an energy harvesting unit has been developed and the effectiveness of this module has been investigated for pavement system comprising of sand and aggregate layers. Parametric studies have been carried out for different magnitudes of load and frequency of loading. The manuscript also compares the displacements of sand-aggregate system having PZT module at its interface with a system without the module. Experimental studies revealed that the voltage generated is dependent upon the stiffness of the PZT module and the voltage increases with magnitude and frequency of loading.