Columbus, OH has one, and so forth.
Chicago used to ship "sealed containers" which were actually regular railway freight cars, to New York for transport on ships to Poland.
BTW, Chicago is a pretty big "Inland Port" itself ~
For the purposes of truck and rail traffic, it is.
I agree. All we're really talking about is making delivery of goods more efficient. It also occurs to me that having goods funnelled to a central interior location might make it easier to control security. Of course the route would have to be secure as well.