This was posted in the Austin newspaper about a new track being built just outside of town. A portion of the track is already built with new sections and shops being built currently.
http://www.statesman.com/search/content/sports/stories/other/12/25/1225Driveway.html
http://www.statesman.com/search/content/sports/stories/other/12/25/1225Driveway.html