To clear the heavy waiting list, T.No.16057/16058 Chennai Central – Tirupati – Chennai Central Sapthagiri Express trains and T.No.16053/16054 Chennai Central – Tirupati – Chennai Central Tirupati Express trains will have 2 AC chair cars against 1 AC chair car now and 6 reserved second class chair cars against the existing 3 reserved second class chair cars from 17.9.2012 to 31.1.2013.