The gantry structures for highways are classified into various types based on their purposes and functions, such as ETC gantries, height-limiting gantries, traffic monitoring gantries, and so on. These poles are typically made of sturdy materials like steel, possessing sufficient strength and stability to withstand external forces like wind loads and vehicle impacts. Their structures commonly consist of columns, beams, braces, and other components, which are connected through welding or bolting.
