In a development that will impact rail travel in the coming days, trains between Chennai and Tirupati will be suspended from September 28 to October 12 due to track upgrades at Renigunta yard. Apart from that, a total of 12 express trains are set to be cancelled in October due to interlocking procedures and the commissioning of the third line at Bapatla station, which falls under the Vijayawada division of South Central Railway.