I would say that is one good idea, and parts of this will still be built.
I do believe they need to make separate lanes for trucks.
Now it's back to the old method of building a few miles at a time, separate rows for rail, pipelines, transmission lines, etc and in the meantime the congestion gets worse.
You are correct about the I-35 corridor from San Antonio north to the DFW area. There are some tollroads being constructed paralleling parts of I-35 that hopefully will help some. Hopefully the Sequin to north of Austin 130 will eventually get funded and built.
Problem is, that it’s not just a new highway. It’s the “NAFTA Superhighway” that will eventually extend from Mexico to Canada, and is intended to be the vanguard for the open-borders of the “North American Community”.
The Pheonix may be dead...for the moment.