I have thought, from time to time, that when a new highway is built, it should automatically have at least three lanes in each direction. I’ve also contemplated the idea of expanding all interstate highways to at least six lanes. That, however, would cost hundreds of billions of dollars.
If you go 100 miles west of San Antonio on I-10 to the junction of I-20 east of El Paso, I can't really see the need for that highway to be tree lanes in each direction.