Chicago Transit Authority Employees Retirement System board will add a 401(k) plan to its defined benefit and 457 deferred compensation plans, according to Dennis Anosike, senior vice president and treasurer. The board opted to include a 401(k) plan because it has a higher deferral limit than the 457 plan and has other so-called back-end advantages, he said. The investment committee is reviewing the available funds through administrator Great-West Life, Mr. Anosike said. The 457 plan has 15 investment options. "The goal is to maintain at least most of the categories for each of the options, and many of the investment choices could be the same, Mr. Anosike said. While employees have been notified of the addition, the enrollment period will begin immediately upon selection of the fund lineup, he said.