An empty westbound Missouri Pacific coal train with MP SD40-2 3235, Rio Grande SD40T-2 5392, MP SD40-2 3214 and a yellow/gray MP SD40-2 3228 leaving Houston, Texas.
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.