In flexible pavement construction, the most commonly used bituminous mixes comprise Bituminous Concrete, Dense Bituminous Macadam (DBM) and Stone Mastic Asphalt. Bituminous mix design mechanism defines the proportion of binder and aggregate matrix to be kept for the optimum mix. Amongst adopted mechanisms, Marshall Method has been the most widely used one. Aggregate’s most significant characteristic, gradation severely affects the mix properties. The most optimal gradation is the one which gives maximum mix density due to confinement of fine particles between coarser particles reducing void spacing to a specified limit. The objective of the present study is to determine the impact of aggregate gradation as well as compaction effort on the stability-flow and volumetric parameters of DBM mix. Marshall parameters were evaluated for three gradations types (MORTH, ASTM and Kandhal) and three compaction levels (50, 75 and 100 blows) for each gradation, according to low, medium and high traffic loading at 4%, 4.5%, 5% and 5.5% bitumen content. Results shows that the maximum value of Marshall strength is 27.44 kN which was achieved in case of MORTH gradation with 100 blows at 5% bitumen content. In case of ASTM gradation, the maximum stability is 18.9 kN (5% bitumen) while for Kandhal gradation, maximum stability is 18.8 kN (5% bitumen) for the compaction effort of 100 blows and 75 blows respectively. This study reveals that MORTH Gradation is best for high traffic pavement designing in which the escalated energy levels of compaction do not change the aggregate pattern of degradation.