The EMD SD40 is a diesel-electric locomotive built by the Electro-Motive Division of General Motors. Introduced in the 1960s, it features a powerful 3,000 horsepower engine and is designed for heavy freight service. The SD40 is known for its reliability and efficiency, making it a popular choice among railroads. With a length of approximately 68 feet, the SD40 can haul large loads across various terrains. It has a distinctive appearance, characterized by its high short hood and large cab. Many units remain in service today, showcasing the enduring legacy of the SD40 in the rail industry.