Bitumen Viscosity Grade (VG) is a classification system used to categorize paving bitumen according to its viscosity at specific temperatures, providing a reliable indication of how the binder will perform during asphalt mixing, paving, compaction, and service. Common grades include VG10, VG20, VG30, and VG40, with higher VG numbers representing higher viscosity and greater stiffness. VG10 is generally suitable for colder climates and applications requiring greater flexibility, while VG30 is widely used in standard road construction and asphalt pavements. VG40, with its higher viscosity and resistance to deformation, is commonly selected for heavy-traffic roads, highways, intersections, airport pavements, and regions with high temperatures. Choosing the appropriate Bitumen Viscosity Grade helps improve pavement stability, durability, workability, and resistance to rutting and temperature-related damage.