Old article
NAFTA Superhighways
I-69, I-35 and the rest of the network of highway expansions between Canada and Mexico
The NAFTA Superhighway project is a series of north-south interstate highways across the U.S. These new and expanded roads would stretch from Canada through the U.S. to Mexico (excepting certain East Coast routes that would merely connect to ports on the Atlantic or Gulf coasts). The initial proposal for NAFTA Superhighways was in the 1991 "ISTEA" Federal transportation law, but has now expanded in scope to encompass several "superhighways on steroids." Some of these oversized roads would have car lanes, truck only lanes, parallel freight train rails, passenger train rails and utility corridors (electricity, oil, natural gas, water, etc).
https://peaktraffic.org/nafta.html