







St. Louis is one of the most important railroad hubs in the United States, strategically located along the Mississippi River and serving as a key interchange point for eastern and western rail networks. The rail infrastructure includes extensive freight yards, interlockings, and multiple mainlines designed for heavy axle loads and high-capacity operations. Tracks in the region are built to Class 4 and Class 5 standards in many sections, allowing freight speeds up to 60 mph and passenger speeds up to 90 mph where applicable. The network supports double-stack container trains, autoracks, bulk commodity trains, and unit trains, reflecting its role in intermodal and industrial transport. Modern signaling systems such as centralized traffic control (CTC) and positive train control (PTC) are widely used to enhance safety and operational efficiency. St. Louis rail lines are operated by major Class I railroads and regional carriers, making the city a vital technical and logistical backbone of Midwestern rail transportation.