Light Weight Deflectometer (LDW) test is a Non Destruction Testing (NDT) used to analyse the deflection in road pavement layer to in order to measure the vertical deformation based on deformation teh elastic modulus of material under control load can be calculated. The method is a Non-Destruction Test (NDT). This method is use safe in time and cost. The LWD Test is conducted to determine the structural strength of subgrade layer mixed with 2% level of lime and density of a layer. The LWD test method analyzes the stiffness by dropping a load from certain height, the deflectometer recordered by geophone sensor. Using Boussineq Method the elastic modulus can be obtained. The conducted on subgrade layer was conducted for 7 days with 3 times testing, in day 0, day 3, and day 7. On one day of the experiment was carried out at 16 points, each point 5 times. The result of the testing is: the average value of modulus of elasticity on the zero-day test worth 63.97 MPa, the third-day test worth 72.32 MPa, and the test on the 7th day at 74.87 MPa. The result of the LWD research is compared with the DCP elasticity modulus from the Dynamic Cone Penetrometer (DCP) experiment with the same test object, and as a final result, the DCP unit number is higher than the LWD value obtained.