North Texas toll roads ignore safe engineering standards to allow the state to set up speed traps. Toll road operators in North Texas are ignoring state law by imposing arbitrary speed limits that are set far below the safest level suggested by engineering surveys. A WFAA-TV investigation discovered that the North Texas Tollway Authority set speed limits on portions of the Dallas North Tollway and all of the Bush Turnpike without performing the scientific studies required by state and federal law. "Statistics show that 85 percent of the people drive at a prudent and reasonable speed," Kelly Selman, TxDOT director...