A "curb" is a raised edge or boundary along the side of a street or sidewalk. It is typically made of concrete or stone and serves to separate the roadway from pedestrian areas. Curbs help to manage water drainage and provide a clear distinction between where vehicles can drive and where people can walk. In addition to their practical uses, curbs can also enhance the appearance of urban landscapes. They are often designed to complement the surrounding environment and can be found in various shapes and colors. Curbs are an essential part of city planning and contribute to overall safety for both drivers and pedestrians.