Departure at 4am will not serve any purpose....To reach station people will need to leave that early which I don't think will serve the purpose. I am sure railways will themselves know this. Maybe beneficial to intermediate passengers probably from Thrissur & Palakkad. But from CBE onwards again it may be vacant since CBE-SBC there are already trains like CBE-LTT, VB, Double decker at different timings which gives more flexibility to passengers boarding from there