What is the difference between type 1 and type 2 asphalt?

Type 1 asphalt is typically used for surface layers and has a higher binder content, providing better durability and resistance to deformation, making it suitable for high-traffic areas. Type 2 asphalt, on the other hand, is used for base layers and has a lower binder content, which makes it more cost-effective for applications requiring less strength. The choice between the two types depends on the specific requirements of the paving project, including load-bearing capacity and environmental conditions.