........ The Trans-Texas Corridor project, as first envisioned by Republican Gov. Rick Perry in 2002, would be a 4,000-mile transportation network costing $175 billion over 50 years, financed mostly if not entirely with private money. The builders then would charge motorists tolls. But these would not be mere highways. Proving anew that everything's big in Texas, they would be megahighways ? corridors up to a quarter-mile across, consisting of as many as six lanes for cars and four for trucks, plus railroad tracks, oil and gas pipelines, water and other utility lines, and broadband transmission cables. Supporters say the corridors...