Its a good start and good that you are using TransDem, but since your building this in TS10 theres alot better content you can use. For tracks, Slave-Drivers on USLW look right for most CSX tracks that I've seen, atleast in the south, not sure further north but he had made them in white, and two shades of gray ballast. Some higher res ground textures are also a must, I believe Slave-Driver made some custom ballast textures to go with his tracks and Trainz includes a few high res ballast textures. the oversaturated dark green grass has got to go too, you never ever see grass that color, atleast in the US. I highly recommend FMA's textures on the DLS, search the author "vendel", though not high res they are very well colored.
Also check out JointedRail for some better looking GEVO's and other CSX motive power

Good luck!