An elevated highway is a type of road that is built above the ground level, often supported by columns or pillars. This design allows vehicles to travel over existing streets, railways, or other obstacles, reducing traffic congestion and improving travel efficiency. Elevated highways are commonly found in urban areas where space is limited. These structures can vary in length and height, depending on the specific needs of the area. They are often part of larger transportation systems, such as interstates or expressways, and may include features like overpasses and interchanges to facilitate smooth traffic flow.