NS901 led by two GP38-2's rolls through Glenfield,PA with Federal Railroad Administration DOTX 219 in tow.
DOTX 219 Entered service in 2007 and can operate in either self-propelled or towed mode, its equipped with a track geometry measurement system to measure gage, alignment and track surface andis also equipped with a vehicle track interaction (VTI) system to measure truck and car body forces in G's
