I model the transition era, but recently have become interested in modern-day Norfolk Southern coal operations, and I am starting to think about what a roster would look like. For locomotives I know that they mostly run SD70ACEs and GE44-whatevers, but what else is still in mainline service? Any SD40-2s? SD50s, 60s? Is a GP-15-1 appropriate as a switcher? Then what about coal cars? Top Gons, Bethgons, RD-4s? And who manufactures these? I guess some other cars for a mixed freight would be necessary. What would be in a mixed freight? Any info is appreciated, and I'm not the only one this will help. I don't have an NS mainline near me I don't think. I'm also not going to buy any of this now, but down the road I will.