AUSTIN – State Transportation Commission Chairman Ric Williamson is proud that he can still work a bulldozer, a skill he learned early on the ranch and in the gas fields. Others would say he still drives it at meetings, committee hearings and town hall gatherings. Mr. Williamson, 55, is one of the most influential men in Texas. He has the ear of the governor, with whom he speaks almost daily. He is the architect behind the state's road plan for the next 25 years. He is smart, studious, self-made. And critics, who seem as endless as a West Texas highway,...