Kerbs, also known as curbs, are the raised edges that line the sides of roads, pathways, and sidewalks. There are several synonyms used for the word kerbs, such as curbstones, gullets, gutters, and borders. In some regions, they refer to kerbs as "edgestones," "boundary stones," or "verges." The term "curbing" is also used to describe the act of installing, repairing, or replacing kerbs. The materials used for kerbs may vary, too, from concrete, granite, brick, or asphalt. Whatever term or material is used, kerbs serve as vital elements for mobility and safety in many urban landscapes.