ICE connecting major cities with the states is added with more and more stops then the solution for fast connectivity for major cities is HSRC. Regarding Mangala, certain trains primarily cater to certain region/zone etc like Mangala, Malabar for Kerala/N. Malabar etc and Matsyagandha for Dakshin/Costal Karnataka will be having more stops to cater that regions are some example. As said by Mr. Rajeev "Kerala where there are small and small towns after every 25-30 km" and which are growing rapidly year-by-year the situation will go worse in the coming years.