The Alco RS-1 is a type of diesel-electric locomotive built by the American Locomotive Company (ALCO) from 1941 to 1960. It was designed for both freight and passenger service, featuring a powerful 1,600 horsepower engine. The RS-1 is notable for its versatility and reliability, making it a popular choice among railroads during its production period. With a total of 1,200 units produced, the RS-1 became a significant part of many railroads' fleets across North America. Its distinctive design includes a low hood and a long, streamlined body, which contributed to its efficiency and ease of operation in various rail environments.