getting back to the original topic, the article says
Supporters say the corridors are needed to handle the expected NAFTA-driven boom in the flow of goods to and from Mexico and to enable freight haulers to bypass heavily populated urban centers on straight-shot highways that cut across the countryside
a chart of trade to Mexico. NAFTA kicked in about 1994. the trend would appear that trade has peaked and is now subsiding. Are these highways really necessary for NAFTA? Or is this a smokescreen to introduce more toll roads here in Texas?
Really, all they need is a loop around Austin to accomplish the same thing on 35 :-)