AUSTIN – Four years of simmering frustration boiled over at a recent Texas Senate committee hearing with just one thing on the agenda: toll roads. An overflow crowd bashed and booed the Texas Transportation Commission in front of mostly like-minded senators. For eight hours, lawmakers and audience members alike questioned the state's increasing reliance on tolls. "We can't simply build roads at any cost," Sen. John Carona said to cheers. "We've got to build them smarter." Some argue that toll roads are the only smart play in a state where the Legislature has refused to raise the tax on gasoline,...