You are only thinking in perspective of Kerala. While I am saying in perspective of Tamil Nadu. This line should benefit Tamil Nadu more than Kerala. Their needs should be taken into consideration first. If all trains from Kerala are put in single line, finally track will be saturated. This section should help MDU,PALANI, POY ppl to reach western part of India in faster manner, similarly thiese places to CBE which is one of the main cities in Tamil Nadu. Why should it be saturated with trains from Kerala.
May be you might think we people are Dumb, but my ideas are based on entire railway, not just biased towards one particular state.