Freight cars are specialized railway vehicles designed to transport goods and materials across distances. Unlike passenger cars, which carry people, freight cars come in various types to accommodate different cargo, such as boxcars for general freight, flatcars for heavy machinery, and tank cars for liquids. They are essential for the logistics and supply chain industries, helping to move products efficiently. These cars are typically coupled together to form long trains, allowing for the transportation of large quantities of goods at once. Freight cars are an integral part of the railroad system, contributing to economic growth by facilitating trade and reducing transportation costs compared to trucks.