The first and only underground metro network in Mumbai, the Bandra-Colaba-SEEPZ line called Line-3, is now 76.6% complete, according to the Mumbai Metro Rail Corporation Ltd (MMRCL).

According to SK Gupta, Director (Projects), MMRCL, the first segment of Mumbai Metro Line-3 between Aarey Milk Colony and Bandra-Kurla Complex and the Aarey Car Shed would be operational by December 2023.

Line-e is a 33.5 km long underground passage with 27 stations, 26 of which are underground. "The stations in the stretch, including the Aarey Colony station, should be ready by December next year," Gupta said.

Mumbai's major financial centers including Nariman Point, Bandra-Kurla Complex, Fort, Worli, Lower Parel and Goregaon would be connected by Metro Line 3.

In addition, the alignment would connect CSMT and Churchgate, two important historic stations in Mumbai. The maximum number of passengers the metro trains can carry is 2,350, and they will be powered by a 25 KV AC traction power supply.

The project is expected to cost around Rs 380 billion, and 50% of the total cost of the project will be borrowed by the Japan International Cooperation Agency while 20% will be funded by the Union government.

The line would be ready sometime in 2021. However, work delays pushed the cost of the project up from Rs 231.36 billion as the deadline was missed.