<p>This is the study of relationship of dynamic cone penetration (DCP) and moisture content, plastic index, particle size and dry density of soils. The aim is to predict the properties of soils and adjustments of DCP test results. The DCP data analysed by software programs are adjusted to moisture regime for the valuation of the projected long-term moisture condition and the in-service performance in the pavement. The moisture content, plastic index, particle size and dry density during DCP alignment survey for in situ tests are not considered in the software analysis. The in situ DCP alignment survey test carried out throughout rainy season differs with that of dry season of the same long-term moisture regime. Similarly, the DCP value for upgrading differs with the new construction of road due to the existing soil type and properties. Several standards require the maximum particle size of the soil to be two-third of compacted layer thickness. The in situ particle sizes remain as natural as from the source; however, the preparation of samples for laboratory requires material passing 20&#xa0;mm test sieve. This results in an increase of laboratory DCP-DN values (average penetration per blow) and a decrease of field DCP-DN values. The analysis shows acceptable model for assessing and evaluating soils to be imported for new construction of road layers, adjustments of the onsite strength of the road and evaluating the suitability of borrow pit materials by using DCP.</p>