SGR(표준궤 철도) refers to the standard gauge railway system, which uses a track width of 1,435 mm (4 ft 8 1⁄2 in). This gauge is widely used around the world, providing compatibility and efficiency in train operations. Standard gauge railways facilitate the movement of passengers and freight over long distances, enhancing connectivity between regions. The adoption of SGR allows for the use of modern trains that can travel at higher speeds and carry larger loads. Many countries have invested in SGR infrastructure to improve their transportation networks, making it a crucial component of global rail systems.