Even as Metro networks expand rapidly across nearly 20 cities, large-scale systems have proved difficult to sustain as commercially viable private assets. Governments continue to lean on private capital to bridge funding gaps, but experts suggest the model needs recalibration amid recent exits of private players.   Hyderabad Metro Phase-I, one of the world’s largest PPP metro projects, is set to be taken over by the Telangana government, which will refinance debt and acquire L&T’s entire equity stake. T ...