Leading BNSF’s HKCKSPO freight are Montana Rail Link EMD SD45s Nos. 355 and 326 (MRL labels the rebuilt locomotives SD45-2s) crossing a bridge at Tuscor, Montana, on September 26, 2014.
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.