Issued by the United States in 1960, this 4-cent stamp titled Wheels of Freedom celebrates the vital role of transportation in supporting economic growth and global connectivity. The design features a stylized wheel at the center containing symbols of modern transport—an airplane, train, and truck—representing air, rail, and road networks. On either side of the wheel appear world maps, emphasizing international trade and mobility. Printed in blue, the stamp highlights the idea that freedom of movement and efficient transport systems are key pillars of prosperity. It remains a distinctive thematic issue for collectors interested in transportation and commerce.