The lines 3, 4 and 5 are proposed to have 48, 28 and 46 stations, respectively. Around of phase 2 is planned to be underground and the rest to be elevated. A depot is also proposed at Madhavaram, similar to the existing depot at Koyambedu. And the present estimate for the phase 2 is at Rs. 61,000 crore and approval has been received from the state government. Foundation stone for phase 2 was laid on 20 November 2020 and construction for the phase is expected to begin in 2021 once approval is received from the central government. The preparatory work for the second phase of Chennai Metro Rail project has been hit due to delay in the selection of the general consultant (GC) after concerns were raised by more than 50% of bidders on the CMRL shortlisting companies based on their technical qualifications. Addressing an event in Chennai, Prime Minister Narendra Modi on Sunday 14 February 2021 said the Centre has set aside Rs 63,000 crore in this