Civic groups report the existing Hyderabad Metro is currently handling only 4-4.5 lakh daily passengers against a 15 lakh capacity.
Demands include releasing CAG-audited financial statements and details of the cancelled Rs 13,527 crore refinancing agreement.
The proposed Phase II expansion involves seven corridors covering 122.9 km with an estimated cost of Rs 38,595 crore.
Advocates are calling for independent ridership studies and formal public consultations before the expansion is approved.