Three more coaches of Hyderabad metro rail have reached Hyderabad from South Korea after they reached Chennai port on a cargo ship. They coaches will be mounted on rails at the Uppal elevated rail track for trial run on September 15. But the coaches will go for trial run only after the South Central railway officials check and certify the safety of Uppal-Mettuguda track. The Nagole-Mettuguda track may become operational by March 1 of next year, if everything goes well.