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Currently I'm thinking of shamelessly coping ether of David K Smith's JCIR or the HMRR with expansion in the dimensions. Before I do that I'll seek his permission...
New York Dock influence.
You know what sucks a giant fat one?Trying to construct a passing loop with unitrack when the turnouts are in anyway not on a perfect compass axis.
I don't want to even think of what the grade is for your plan...
BTW, why 3" rise? 2" is more than adequate. The above grade works out to ~5%.