The PRR's position lights are an endangered species. A few vintage examples still cling to life on the mountainside above Altoona, such as this one at PT 244. As an intermediary (automatic block) signal, once PTC is rolled out on the Pittsburgh Line, it will go dark and eventually be removed and scrapped.
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.
