The layers of an asphalt driveway typically consist of a subgrade layer, a base layer, and then the asphalt surface. The subgrade is the soil beneath the driveway that provides stability for the structure. The base layer is made up of crushed stone or gravel which helps to provide drainage and support for the asphalt surface. Finally, the top layer is composed of hot mix asphalt which creates a durable and smooth driving surface. Asphalt driveways require proper installation in order to ensure long-term performance and durability.