PURPOSES : For the compaction control on the subgrade layer, dynamic cone penetration test (DCPT) is being applied to the Korea pavement subgrade construction guidelines. The existing equation in the Korean guidelines for estimating the resilient modulus, MR, from the DCPT test result penetration rate (PR), is a correlation developed from a small amount of data and does not consider the degree of compression. Therefore, this study attempts to propose an advanced MR-DCPT PR correlation through the correction of existing data and additional field tests. METHODS : The in-situ DCPT tests were conducted according to the types of subgrade soils in the field. Thereafter, the existing guideline‘s data were collected and corrected with the degree of compaction, R. RESULTS : In this study, the correlation coefficient is improved such that it is considerably higher than the existing equation using additional field data and converting the data used in the existing equation into data with over 95% degree of compaction. CONCLUSIONS : Through verification, it was found that the relative errors of the proposed correlations in this study were reduced when compared with the existing equation.