Bitumen modifiers enhance the performance of modified asphalt by improving its properties such as elasticity, temperature susceptibility, and resistance to aging and deformation. These additives, including polymers and rubber, increase the binder’s viscosity and adhesion, leading to better durability and flexibility. Consequently, modified asphalt exhibits superior resistance to cracking, rutting, and moisture damage, making it more suitable for high-traffic and extreme weather conditions, ultimately extending the lifespan of pavement structures.