There are no "NAFTA Super-Highway" projects being built at all. What's happening is that the U.S. Interstate Highway System is celebrating its 50th anniversary this year, and many parts of the system are reaching the end of their design life. As part of the process of upgrading/rehabilitating the system, key highway "trade corridors" are being identified that will be rebuilt to accommodate uniform load standards (height and weight) that would be consistent with Canadian and Mexican highways.
"There are no "NAFTA Super-Highway" projects being built at all."
Come see what's going on right now in Texas. Check out the Texas Super Corridor.