Actually, if you take UA, perhaps we have Kochi with a million plus population?
Kochi metropolitan area - Wikipedia, the free encyclopedia
besides, just 4-5kms out of CBD, all other parts of the cities are divided into various municipalities(Kalamassery, Thrikkakkara, Thripunithura etc) which is a dampener. TVM Lobby is always against the city. that makes it more hard for Kerala's ruling parties to give a concentrated effort to grow Kochi city. as of 2014, Kochi is still suffering with no bypass flyovers built neither adequate infrastructure. Kerala government still gives Kochin a step motherly treatment(Kochi contributes 40% or so of the revenue to state Khajana). love is always for Trivandrum, a city sustained by government employees, for the employees, by the employees(and their kids).