In design process of hot mix asphalt (HMA) mixtures, selection of aggregate gradation plays an important role for controlling the volumetric and physical properties of the HMA mixtures. However, the recent Vietnamese specification does not include guidance on how to decide an aggregate gradation which leads to desired voids in mineral aggregate (VMA) and sufficient rutting resistance of HMA mixtures. Therefore, objective of the study is to carry out two tasks. The first task is to investigate whether the value of VMA of wearing course mixture can be affected by the use of continuous maximum density (CMD) parameter. The second task of the study is development of dominant aggregate size range (DASR) model to check the coarse aggregate structure, which is related to the rutting performance of HMA. Based on aggregate gradation, three ratios are determined in order to achieve the proper aggregate gradation, namely porosity (η), disruption factor (DF), and apparent film thickness (AFT). Rutting resistance of seven HMA mixtures were evaluated using a wheel-tracking test (WWT). The results present that CMD is greatly useful tool for analyzing aggregate gradation in order to obtain adequate VMA. The three parameters of DASR model sufficiently illustrated resistance of HMA mixtures against the aggregates motions which lead to rutting.