Standard gauge railways use a track width of 1,435 millimeters (4 feet 8.5 inches), which is the most widely used railway gauge in the world. This uniformity allows for easier interoperability between different railway systems, facilitating the movement of trains across regions and countries. The standard gauge was first adopted in the early 19th century and has since become the global norm. Many major rail networks, including those in the United States, Europe, and Australia, utilize this gauge, contributing to efficient freight and passenger transport across vast distances.