Vinny: What about changing the leads from your turnouts as wide as you can and placing buildings for switching operations? Look at your hand, your fingers are nice and parallel but if you spread them as wide as possible and stick a factory or such between them, you can do switching. You could still have the outer main for the Amtrak and use the inner loop for switching to different industries.
I like this idea, but the main focus of the layout is a passenger rail service. There is to be a town and whatnot, but as for the yard, all there will be is an engine facility. Like I said, my track plan had changed, and now I have to apply these changes.