NS 202 (CSX Z359-26) is coasting at the bottom of the grade at Wauhatchie, the haulage rights train is running on a medium-clear signal where they will cross over the CSX main onto the connection track and get back on home rails for Chattanooga. In a much different time this section of railroad was notorious for being a bottom neck for traffic on the CSX Chattanooga Sub main. Before their was a double track main, this was the old Wauhatchie Pike, with two and half mile of single track from Wauhatchie to Wildwood you can see why they added a main 2 track years later. With Koch Feed Mill just half way up the single main the yard job could block all through traffic both direction, and let not for get the occasional massive CSX freight that was needed to swap at the Wauhatchie Pike, but CSX had an advantage. If CSX had to they would send all traffic that needed a crew swap down the Yard lead and into Wauhatchie, and then out of the south-end lead at Lookout to bypass the old main track to keep traffic a flow, not so much for the other railroad as traffic for NS would have to wait til what ever was occupying Wauhatchie block to get in the clear.