The pattern of EMU train services between Chennai Beach and Tambaram would be changed due to line block permitted in the Egmore-Villupuram section at Tambaram Yard till October 17 from 12:25 am to 2:25 am (2 hours). Train 40149 Chennai Beach-Tambaram EMU local leaving at 11:59 pm and Train 40150 Tambaram-Chennai Beach EMU local leaving at 11:40 pm would be fully cancelled till Oct 17. Train 40419 Chennai Beach-Tambaram EMU local leaving at 11:59 pm and Train 40420 Tambaram-Chennai Beach EMU local leaving at 11:35 pm would be fully cancelled between Oct 8-15, a statement issued by SR (Southern Railway) said.