[5] After over 9 years of delays, due to slowdowns in construction caused by lack of labour and adequate funding, along with land acquisition issues,[5] the Line-1 of the metro commenced operations on 17 November 2023.

[6][1] The Navi Mumbai Metro projects received formal approval on 29 April 2010, and a public hearing on 21 May 2010 reported no major objections to the plan.

[7] CIDCO was named as the implementing agency of the Belapur–Pendhar–Kalamboli–Khandeshwar line, under the Indian Tramway Act 1886, by the Government of Maharashtra on 30 September 2010.

[8] In February 2017, RITES submitted an interim detailed project report (DPR) for Lines II, III and IV of the Navi Mumbai Metro.

[15] In 2014, the Chinese company CSR Zhuzhou signed a contract with CIDCO to supply rolling stock for the first phase of the metro's Line 1.

[15] Construction of Navi Mumbai Metro Line 1 progressed steadily from 2018, with trial runs starting in 2019 and delays due to COVID-19 pushing completion to 2024.

After receiving safety clearances, the line was opened for commercial operations on November 17, 2023, and reinaugurated by PM Modi in January 2024.