“...I fail to see why anyone else should be concerned with another road down there”
I would agree if that road is just another road.
What I do find alarming is the notion of putting inland “ports” (with questionable sovereignty) along that new “just another road”.
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 ~
May want to research Kansas City SmartPort. May have to be considered soverign soil of Mexico. Reportedly mandated by Mexican government in ordr for them to participate and was done with the knowledge of U.S. State Dept. KC Southern Railway has bought up right-of-ways and railtracks from Mexico north. KC is hub of I-35 north/south and I-70 east/west. San Antonio would be hub for I-35 north/south and I-10 east/west. As an aside, new mayor of KC under fire from LULAC and like organizations for appointing someone to head parks board who has a membership in Minuteman. They threatening to cancel their convention in KC.