. An analytical method of overlay design has some advantages, such as to take into account the variation of loading types, which will give more exact and accurate results. The purpose of this research is to analyze the existing pavement structure of Jakarta-Cikampek toll road, for analysis period between 1988 to 2008 and to calculate the Overlay Thickness required, based on the deflection data using Falling Weight Deflectometer (FWD) equipment. From the deflection data, Resilient Moduli in each layer can be determined. Considering the Cumulative Damage theory and the allowable stress/strain in each layer, the overlay thickness needed were obtained. These results could be compared to the calculation results using semi-analytical method i.e. AASHTO® 2003 method.The result of Resilient Moduli in each layer shows that those values could identify the weakness layer in the pavement structure, indicated by the lower value of Moduli. The calculation of Cumulative Damage for each section showed some locations that needed to be overlaid immediately. If the actual Cumulative Damage is greater than the allowable one, the overlay is needed. This means that pavement structure was not strong enough and need to be repaired in short term.