Surfacing: The application by thermal spraying of a layer or layers of thermal spray materials to a surface to obtain desired properties or dimensions.
That part of a pavement specifically designed to resist abrasion from traffic and to minimize the entry of water. It may be a sprayed seal, asphalt or other material.
Material placed on top of the trailbed or base course that provides the desired tread. It lessens compaction of soil, provides a dry surface for users, and prevents potential erosion and abrasion.