[Tolerance Sucks Rocks]

Narrowing the corridors to minimum width will reduce the cost of overpasses (@~$3000/linear foot and required solely to cross the closed-access cargo corridors) so that the "Great Wall of Texas" effect is reduced.

I would recommend 300 feet (like a standard interstate), so as to allow room to add lanes, in case truck traffic increases. You do recall the difficulties with I-35, because it has such a narrow right-of-way?

[TXnMA]

I (generously, IMHO) allowed 400 width', to include a rail line or two if needed...

Yeah, I know rail and road have different grade requirements, but my goal was to show that even that token width reduction would allow the project to afford three times as many crossovers for the same cost...

FYI, I have made my last response to Ben Ficklin -- the guy is stuck on irrelevancies and ad hominem sneers, and refuses to make any positive contribution. At least I am applying the capitalist/engineering principle that profitability can be maintained/increased by reducing cost...