Continuing on the previous post looking at the TXDOT roadway data tables, here is the square footage of roads and streets per capita in the six counties of the CAMPO (Austin) region.
This is why exclusionary zoning in central cities is such an environmental disaster. Each person in Hays county is kind of responsible for 533 more square footage of roadway than each person in Travis County.
Or put another way...to support the lifestyle of people of Williamson County today seems to require 380 more square feet of impervious surface per person in the form of roadways than supporting the lifestyle of people of Travis County.
Or to put it another way, on average, every person not allowed to live in Travis County who instead lives elsewhere in the Austin region results in an additional 1,419 square footage of impervious surface in the form of roads.