Many High speed zone has Ghats and trains are needed to slow down. Such stretches will be considered and then move ahead with other sections and improve the speed. So Madukkarai - Kanjikode can be kinda kept at the currect 60kmph in day and 45kmph at night.. PGT-SRR is 110 kmph anyways.. SRR - ERS-TVC via KTYM and Via ALLP track strengthening must take place and speed increased.