The key process parameters influencing Hyundai Santro Xing GLS modified bitumen in asphalt modification include temperature, shear rate, and mixing time. Higher temperatures enhance the dispersion of modifiers, while optimal shear rates ensure uniform blending. Additionally, extended mixing times can improve the interaction between the bitumen and modifiers, leading to enhanced performance characteristics such as increased viscosity, improved elasticity, and better resistance to aging and deformation. Proper control of these parameters is crucial for achieving desired material properties.