This paper presents the results of the application of non-destructive test: Falling Weight Deflectometer (FWD) to assess the bearing capacity of the rigid pavement and calculate the overlay on a composite pavement. The present study was conducted on toll roads in Jakarta Outer Ring Roads S-section (JORR-S), with vehicles lane that received relatively heavy axle loads. The main motivation of this research was to evaluate the use of FWD method against destructive testing (DT) - which is relatively time-consuming, unsafe and costly - as the support for decision making in carrying out effective and efficient toll road maintenance. The structural models were build based on the deflection of the FWD and the real traffic load measured using Weigh in Motion (WIM) data. The layers elastic moduli were estimated through back-calculation. Furthermore, the calculation of thickness overlay with bearing capacity values from the non- destructive test data was done using back calculation method. The final calculation results obtained the average thickness of the overlay of 8 cm. It can be concluded that the thickness of the pavement layer has a high influence on the approximate modulus of the bitumen layer to be added. Although the results are specific to this case, it is expected that this study will strengthen the importance of using non-destructive testing for pavement evaluation.