An odd thought came to me over in the Acela II thread, so I'm double-checking math and whatnot: Superliners on the LSL to NY Grand Central Terminal.
And no, I already know they can't go to Boston. Searching this thread tells me "keep to 14.5' in Boston." I'm now wondering if GCT can handle Superliners, even if they need to take a detour through the Hells Gate.