The highway /distance mileage is likely measured by both directions, not just northbound lanes.
Sorry, not even close. I think what the author would have us believe was that Perry wanted to build the "super highway" from down into Mexico all the way up into Canada. As if he had the power to do that.
Look, you can dance around this all the time, and rehash the mileage all ya want, but the fact is the proposed Mexican superhighway, which Perry supported, was to go from Mehico to Canada...
And Perry also supported it being run by a foreign country.
4,000 miles in Texas would have to include all the potential mileage of many future highways of which Texas does need many miles built today to ease the conjestion. Texas currently has the following in interstate miles:
Texas, 17 routes, totaling 3,233.45 miles
The longest Interstate route is I-90 from Seattle WA to Boston MA at 3020.54 miles.
The TTC was proposed in a stealth way, with each state building its part of the highway. This way the they could avoid the approval of Congress which has control over federal highways.