An edge between a sidewalk and a roadway consisting of a line of curbstones (usuallyforming part of a gutter) Curbstone is now used in the improvement of various areas, including landscape design, landscape gardening, suburban construction, where it is used to divide functional areas, framed lawns, sidewalks, and flower beds. Curbstone is not only a decorative role, but also greatly strengthens the laying of various paved road surfaces. It can be different type according to different functions.