After crossing over the state-line CSX X250-04 (Palm Center,FL-Smyrna,TN) is keeping up the pace as the unit train is less the a half a mile from the crest of the Raccoon Mountain Grade. Another example of a strategic move on CSX when moving freight through it's network is running the slow freight traffic both direction up the eastern part of the Southeastern Corridor. The Chattanooga Sub normally see a lot of these slow freight traffic due to the two mountain range. The Raccoon Mountains range which is part of the Cumberland Plateaus, the Chattanooga Sub traverse about 14 miles between Chattanooga, and Haletown, TN and, the main section of the Cumberland Plateaus which the line also traverse is about 7 miles of steep grade. That section of railroad also require pusher service.