The roads start somewhere you can’t see from the stadium. They start in Crockett, in Gilmer, in Lafayette and Shreveport, in the Dallas suburbs, and in the neighborhoods of Houston itself. They start in driveways on a Saturday morning, with a kid in the passenger seat and a parent gripping the wheel a little tighter than necessary, because somewhere down the highway is a place that might become the next four years of a life. Nobody says that out loud in the car. They talk about the weather, or the game, or whether to stop for lunch. On Saturday, No. 17 Houston hosts Cincinnati in Big 12 play…