NS 4000, which has been at Progress Rail in Mayfield, KY since September, has returned to Louisville via the Paducah & Louisville. The unit is seen here tacked onto the head end of the "Southern c... (more)

Norfolk Southern 4001, a Progress Rail model PR43C built from an NS SD50, is in full dynamic braking as the NS 996 test train is being brought to a stop in Carlock, Illinois on Tuesday June 9, 200... (more)

Norfolk Southern 4001, a Progress Rail model PR43C built from an NS SD50, has the NS 996 test train stopped at Goodfield, Illinois on Tuesday June 9, 2009. At the time of the photo, the locomotive... (more)