Extending 2 DD trains in mid day will block the lines both up and down without occupancy. Already VB and Shatabdi are running with only 25-30% occupancy on weekdays and 40% on weekends between Benguluru and Mysore. The options to extend a train to MYS is only Bribdavan express with change in timings to leave Chennai at 620 after Kovai and arrive back to Chennai at 2230 with running time of 7hrs 50 mins. To compensate change in timings DD should be added with 3 more GS.