CHENNAI: Chennai Central – Coimbatore – Chennai Central Shatabdi Express trains have been temporarily augmented to meet the increasing travel requirements of passengers. No12243 Chennai Central – Coimbatore Jn Shatabdi Express has been temporarily augmented with one AC chair car.The additional chair car will be in service till July 6. No.12244 Coimbatore Jn – Chennai Central Shatabdi Express has been temporarily augmented by one ac chair car.The additional chair car will be in service till July 6.