In this study, two different viscosity grade base bitumen (VG10 and VG30) and 3 dosages (2%, 3%, and 4%) of recycled low-density polyethylene (RLDPE) were selected for the preparation of the recycled plastic modified bitumen (RPMB). All modified bitumen were evaluated for physical, morphological, and rheological properties. Results state that the softening point of RPMB increases by 8 °C-18 °C depending on the dosage of waste plastic and type of base bitumen. The dispersion of RLDPE, measured by mean particle size, remains unaffected by the dosage of waste plastic and the type of base bitumen. However, the storage stability of RPMB is primarily governed by the density difference between the base bitumen and RLDPE, and is not influenced by the type of base bitumen.