KANSAS CITY, Mo. - Missouri transportation officials approved a controversial contract Friday that will allow a private corporation to track signals from motorists' cell phones to map traffic snarls and highway congestion on major roads throughout the state. As early as next week, that company, the National Engineering Technology Corp. (NET), will start monitoring thousands of cell phones in Kansas City and St. Louis, using their movements to test how to relay traffic conditions to the public in real time. While officials say the program will make Missouri a national leader in "intelligent" traffic management, privacy advocates are concerned that...