At a mere 48 years old, this old locomotive is earning it's keep. Built in 1970 as C&O 7524, the crew is hustling by the intermediate signals at Hayes on their way to Corbin, KY.
The EMD SD (special duty) series are a strong and reliable kind of locomotive which still serve America's rails today. They have proved themselves reliable by clocking in several million miles of freight service over several decades.