|Owner||MMRDA (all lines except Lines 3), |
Mumbai Metro Rail Corporation (Line 3)
|Area served||Mumbai Metropolitan Region|
|Locale||Mumbai Metropolitan Region|
|Transit type||Rapid Transit|
|Number of lines||Operational 3 | Under-construction 8 | Approved 5 | Proposed 1 ||
|Number of stations||43|
|Daily ridership||4,50,000 (daily average, Jan 2019)|
|Annual ridership||12.6 crore (126 million)|
|Chief executive||Devendra Kumar Sharma|
|Began operation||8 June 2014|
|Operator(s)||Maha Mumbai Metro Operation Corporation Limited (MMMOCL)|
|System length||46.4 km (28.8 mi) (Operational), 115.250 km (71.613 mi) (Under Construction), 151.75 km (94.29 mi) (Proposed)|
|Track gauge||1,435 mm (4 ft 8+1⁄2 in) standard gauge|
|Electrification||25 kV 50 Hz AC overhead catenary|
|Average speed||33 km/h (21 mph)|
|Top speed||80 km/h (50 mph)|
The Mumbai Metro is a rapid transit (MRT) system serving the city of Mumbai and the wider Mumbai Metropolitan Region in Maharashtra, India. Mumbai Metropolitan Region Development Authority is the responsible authority for maintaining the metro system. Maha Metro is responsible for all the metro rail projects undergoing in Maharashtra except the Mumbai Metropolitan Area. The system is designed to reduce traffic congestion in the city, and supplement the overcrowded Mumbai Suburban Railway network. It is being built in three phases over a 15-year period, with overall completion expected in October 2026. Mumbai Metro is the sixth longest operational metro network in India with operational length of 46.4 km (28.8 mi) as of January 2023. When completed, the core system will comprise fourteen high-capacity metro railway lines and one metrolite line, spanning a total of 356.972 kilometres (221.812 mi) (24% underground, the rest elevated, with a minuscule portion built at-grade), and serviced by 286 stations.
Line 1 of the Mumbai Metro Line 1 is operated by Mumbai Metro One Private Limited (MMOPL), a joint venture between Reliance Infrastructure (69%), Mumbai Metropolitan Region Development Authority, (26%) and RATP Dev Transdev Asia, France (5%). While lines 2, 4, 6, 7 (under construction), 5 and their extensions (bidding in progress) will be built by the Mumbai Metropolitan Region Development Authority (MMRDA), the completely underground Line 3 (also under construction) will be built by Mumbai Metro Railway Corporation Limited (MMRCL). The total financial outlay for the expansion of the metro system beyond the currently operational Line 1 is ₹82,172 crore (equivalent to ₹980 billion or US$12.26 billion in 2020), to be funded through a mix of equity and bilateral, multilateral as well as syndicated debt. In another boost to connectivity, the Mumbai Metropolitan Region Development Authority (MMRDA) has decided to connect Mumbai and Virar with a Metro line.
In June 2006, Prime Minister Manmohan Singh laid the foundation stone for the first phase of the Mumbai Metro project, although construction work began in February 2008. A successful trial run was conducted in May 2013, and the system's first line entered into operation on 8 June 2014. Many metro projects were being delayed because of late environmental clearances, land acquisition troubles and protests.
The financial capital of India received its first Metro in June 2014, and nearly after 8 years, Mumbai welcomed its two new metro corridors 2A and 7, which are now partially operational. Chief Minister Uddhav Thackeray flagged off the new metro lines 2A and 7 on 2 April 2022. The line was opened for commercial operation on the same day of the inauguration in the evening from 8 PM onwards. The minimum fare is ₹10 for 3 km (1.9 mi), and the maximum fare is ₹50 for 30 km (19 mi). As a part of the Phase 1 plan, both metro corridors cover a 20 km (12 mi) route (Dahanukarwadi–Dahisar–Aarey). The Metro runs between Dahanukarwadi on Metro Line 2A and Aarey on Line 7.
Mumbai is the capital of Maharashtra. It is among the largest cities in the world, with a total metropolitan area population of over 2 crore (20 million) as of 2011, and a population growth rate of around 2% per annum. Mumbai has the advantage of a high modal share of the public (88%) in favour of a public mass transport system. The existing Mumbai Suburban Railway carries over 70 lakh (7 million) passengers per day, and is supplemented by the Brihanmumbai Electric Supply and Transport (BEST) bus system, which provides feeder services to station-going passengers to allow them to complete their journeys. Until 1980s, transport in Mumbai was not a big problem. The discontinuation of trams resulted in a direct increase of passenger pressure on the suburban railway network. By 2010 the population of Mumbai doubled. However, due to the city's geographical constraints and rapid population growth, road and rail infrastructure development has not been able to keep pace with growing demand over the last 4-5 decades. Moreover, the Mumbai Suburban Railway, though extensive, is not built to rapid transit specifications. The main objective of the Mumbai Metro is to provide mass rapid transit services to people within an approach distance of between 1 and 2 kilometres (0.62 and 1.24 mi), and to serve the areas not connected by the existing Suburban Rail network.
|Phase||Line||Name of the corridor||Length (km)|
|1||Versova - Andheri – Ghatkopar||11.07|
|2||Bandra - Kurla – Mankhurd||13.37|
|3||Colaba - Bandra – Seepz||38.24|
|4||Charkop - Dahisar||7.5|
|5||Ghatkopar – Mulund||12.4|
|6||BKC - Kanjurmarg via Airport||19.5|
|7||Bandra (E) - Dahisar (E)||16.5|
|8||Hutatma Chowk – Ghatkopar||21.8|
|9||Sewri – Prabhadevi||3.5|
The master plan unveiled by the MMRDA in 2004 encompassed a total of 146.5 kilometres (91.0 mi) of track, of which 32 kilometres (20 mi) would be underground. The Mumbai Metro was proposed to be built in three phases, at an estimated cost of ₹19,525 crore. In September 2009, the proposed Hutatma Chowk – Ghatkopar was reduced to a line between Hutatma Chowk and Carnac Bunder.
In 2011, the MMRDA unveiled plans for an extended Colaba-Bandra-SEEPZ metro line. According to its earlier plans, a 20 km (12 mi) Colaba-to-Bandra metro line was to be constructed, running underground for 10 kilometres (6.2 mi) from Colaba to Mahalaxmi, and then on an elevated track from Mahalaxmi to Bandra. However, the MMRDA decided to increase ridership on the line by running it out past Bandra to Chhatrapati Shivaji Maharaj International Airport. The 33.5-kilometre (20.8 mi) Colaba-Bandra-SEEPZ line will be built at a cost of ₹21,000 crore (US$2.6 billion), and will be the city's first underground metro line. It will have 27 stations.
On 27 February 2012, the Union Government gave in-principle approval to the plan for Line 3. Money for the project is being borrowed from Japanese International Cooperation Agency (50%), the state government (16%), the central government (14%), and others. In April 2012, the MMRDA announced plans to grant the Mumbai Metro Rail Company increased management autonomy, in an effort to enhance the project's operational efficiency. In July 2012, the MMRDA announced plans to add more metro lines to its existing plan, including a line parallel to the Western Express Highway from Bandra to Dahisar. This line is expected to reduce the passenger load on the Western Line and vehicle traffic on the highway. Another proposed route, the 30-kilometre (19 mi), 28-station Wadala–Kasarvadavali line, received in-principle approval from the state government in 2013. The MMRDA also intends to convert the proposed Lokhandwala–SEEPZ–Kanjurmarg monorail route into a metro line. The Mumbai Metro master plan was revised by the MMRDA in 2012, increasing the total length of the proposed network to 160.90 km (99.98 mi). In June 2015, two new lines were proposed. A line from Andheri West to Dahisar West, and a line from BKC to Mankhurd. The following table shows the updated master plan unveiled by the MMRDA:
On 18 February 2013, the MMRDA signed a memorandum of understanding with Transport for London, the transit authority in Greater London. The arrangement will facilitate the exchange of information, personnel and technology in the transportation sector.
The revised Mumbai Metro master plan had proposed a line along the Thane-Teen Haath Naka-Kaapurbavdi-Ghodbunder Road route. The feasibility report concluded that the line was not feasible as most residents of Thane and its neighbouring areas travelled to Mumbai for work daily. On 14 June 2014, Chavan announced that the MMRDA was instead examining a proposal for a metro line along the new proposed route of Wadala-Ghatkopar-Teen Haat Naka route. RITES will prepare the detailed project report and is expected to submit it by August 2014. The preliminary report proposed a 32 km (20 mi) line with 29 stations, to be built at an estimated cost of ₹22,000 crore. This would be the fourth line of the metro, after the previously proposed Charkop-Dahisar route was merged with the Charkop-Bandra-Mankhurd route to form Line 2.
Following the opening of Line 1, MMRDA metropolitan commissioner UPS Madan stated that the authority would focus on constructing the Colaba-Bandra-SEEPZ, Dahisar-Bandra-Mankhurd, and Wadala-Thane-Kasarvadavali lines. He also stated that the other proposed lines had not been cancelled and that they may be implemented in the future. In May 2015, the MMRDA stated that it had begun planning for the Andheri-Dahisar line and Seepz-Kanjurmarg. Both lines are expected to be elevated, although the latter could be constructed underground if a proposal to extend Line 3 to Kanjurmarg is undertaken. DPRs for both lines had been prepared in 2004, along with the master plan, and the MMRDA would now update the DPRs. The agency also intends to construct Line 9 of the metro as an underground corridor from Sewri to Worli. However, planning for the project will only begun after the construction of the proposed Mumbai Trans Harbour Link commences.
In a report on 14 November 2014 about the cancellation of the PPP agreement for Line 2, Mint quoted a senior MMRDA official as stating, "as decided earlier, all future lines of Mumbai Metro will be constructed by the Mumbai Metro Railway Corp. Ltd (MMRCL), a joint venture between the state government and the Union government." On 20 May 2015, Chief Minister Devendra Fadnavis requested officials to consider constructing the Charkop-Bandra-Dahisar and the Wadala-Thane-Kasarvadavali lines as elevated corridors. Although, both corridors had been planned as elevated lines in the Mumbai Metro master plan, the previous Congress-NCP had decided to construct all metro lines underground, after delays and difficulties caused by acquiring land for Line 1. However, Fadnavis believes that the two proposed lines can be constructed quicker and cheaper if they were elevated due to the proposed route of the alignment. The Government plans to implement all future metro lines (except Line 3) as elevated corridors. On 15 June 2015, the MMRDA announced that it would implement Line 2 of the metro in three parts. The Andheri-Dahisar line will have connectivity with the existing Line 1 and the proposed JVLR-Kanjurmarg line.
In June 2015, Fadnavis announced that he would request the Delhi Metro Rail Corporation (DMRC) to assist in the implementation of the Mumbai Metro. He stated that he intends to expand the metro system by 109 km (68 mi) before the state assembly elections in October 2019. In July 2015, UPS Madan announced that the State Government formally appointed the DMRC to revise and update the Mumbai Metro master plan. The DMRC will prepare DPRs for the Andheri East to Dahisar East, Jogeshwari to Kanjurmarg, Andheri West to Dahisar West and Bandra Kurla Complex to Mankhurd lines. The Andheri-Dahisar line will have connectivity with the existing Line 1 and the proposed JVLR-Kanjurmarg line. All four lines are proposed to be elevated and constructed as cash contracts. The lines are estimated to cost a total of ₹21,000 crore (US$2.6 billion), or about ₹350 crore (US$44 million) per km. In addition, the planned Line 3 and Wadala-Ghatkopar-Thane-Kasarvadavli line of the metro would also be constructed.
Fadnavis announced on 8 April 2017 that the government was considering a circular metro loop line along the Kalyan-Dombivli-Taloja route. The proposed 15 km (9.3 mi) line would link Kalyan and Shil Phata with 13 stations, bring metro connectivity to Kalyan East, Dombivli, Ambernath and Diva.
The Mumbai Metro resumed services for general public on 19 October 2020, after being shut down since March 2020 due to the COVID-19 pandemic.
Main article: List of Mumbai Metro stations
Lines on the Mumbai Metro are currently identified by numbers. In March 2016, MMRDA Metropolitan Commissioner, U.P.S. Madan, announced that all lines on the system would be color-coded after more lines are opened.
|First Operational||Last Extension||Length||Total
|Track Gauge (mm)||Electrification|
|8 June 2014||8 June 2014||11.40 km (7.08 mi)||12||Versova||Ghatkopar||CRRC
|1,435 mm (4 ft 8+1⁄2 in)||25 kV 50 Hz AC|
|2 April 2022||19 January 2023||18.60 km (11.56 mi)||17||Dahisar (East)||Andheri (West)||BEML|
|2 April 2022||19 January 2023||16.5 km (10.3 mi)||14||Dahisar (East)||Gundavali||BEML|
|Total||46.4 km (28.8 mi)||43|
|DN Nagar–Mandala (Mankhurd)||Mandala||23.643 km (14.691 mi)||20||Elevated||BEML
|Aarey Colony–Cuffe Parade||Aarey Colony||33.5 km (20.8 mi)||27||Underground||Alstom
|Kasarvadavali–Wadala||Vikhroli||32.32 km (20.08 mi)||32||Elevated||Bombardier Transportation
|Gaimukh–Kasarvadavali||Mogharpada (Thane)||2.7 km (1.7 mi)||2|
|Kapurbawdi–Kalyan APMC||Kasheli (Bhiwandi)||24.9 km (15.5 mi)||17||TBA|
|Swami Samarth Nagar (Lokhandwala)–Vikhroli EEH||Kanjurmarg||14.47 km (8.99 mi)||13|
|Andheri (East)–CSMIA International||Bhayander (West)||3.17 km (1.97 mi)||2||Elevated||BEML||MMMOCL||MMRDA|
|CSMIA International–NMIA||TBD||40 km (25 mi)||12||Elevated
|11.38 km (7.07 mi)||10||Elevated||BEML||MMMOCL||MMRDA|
|Gaimukh–Shivaji Chowk (Mira Road)||Gaimukh||9 km (5.6 mi)||5||Elevated||TBD||MMMOCL||MMRDA|
|Wadala–CSMT||TBD||14 km (8.7 mi)||10||Elevated
|Kalyan APMC–Taloja||20.75 km (12.89 mi)||17||Elevated|
|Shivaji Chowk (Mira Road)–Virar||23 km (14 mi)||20||TBD|
|Vikhroli EEH–Badlapur||45 km (28 mi)||40|
|14||Total||297.833 km (185.065 mi)||227|
§ Numbers in italics denote data that is estimated
‡ Lines labeled APR are either in DPR stage, or have not yet entered the planning stage, while those labelled Planned are awaiting clearances to enter the tendering stage
§§§ Extrapolated from weekday daily ridership numbers reported for the last reported fiscal
Main article: Line 1 (Mumbai Metro)
Line 1 connects Versova in the Western Suburbs to Ghatkopar in the Central Suburbs, covering a distance of 11.4 kilometres (7.1 mi). It is fully elevated, and consists of 12 stations. Work on the Versova-Andheri-Ghatkopar corridor, a part of Phase I, began on 8 February 2008. A crucial bridge on the project was completed at the end of 2012. The line opened for service on 8 June 2014.
Main article: Line 2 (Mumbai Metro)
This corridor is being executed in two phases i.e. 2A and 2B.
The 18.589 km (11.551 mi) long 2A corridor is being executed by DMRC on behalf of MMRDA. The corridor has 17 stations (Dahisar (West) to D N Nagar), and is expected to cost ₹6,410 crore (equivalent to ₹76 billion or US$956.70 million in 2020).
Its civil works, including viaduct and stations, are being executed by J.Kumar Infra-CRTG JV. The corridor is partially operational since April 2, 2022 and fully operational since January 19, 2023.
The 2B corridor will be 23.643 km (14.691 mi) long, and is estimated to cost ₹109.7 billion (equivalent to ₹130 billion or US$1.64 billion in 2020), including land acquisition cost of ₹1,274 crore (equivalent to ₹15 billion or US$190.15 million in 2020). This section will have 22 stations (D N Nagar to Mandale), work on which began in mid 2018.
Its civil works, including viaduct and stations, is being executed by Simplex Infrastructure, RCC-MBZ JV and Neeraj-Guam JV.
Line 2 is being partially funded through multilateral debt to the tune of ₹7,498 crore (equivalent to ₹89 billion or US$1.12 billion in 2020) from ADB.
Expected Cost: ₹6,410 crore
Expected Daily Ridership: 9 Lakh (900,000)
Expected Cost: ₹10,986 crore
Expected Daily Ridership: 10.5 Lakh (1,500,000)
Rolling Stock: BEML
Main article: Line 3 (Mumbai Metro)
This corridor is entirely built underground, and is 33.50 km (20.82 mi) long, with 27 stations. The metro line will connect the Cuffe Parade business district in the south of Mumbai with SEEPZ and Aarey in the north. It will also pass through the Domestic and International airports of Mumbai, for which the airport operator (GVK) has promised an equity infusion of ₹777 crore (equivalent to ₹996 crore or US$124.76 million in 2020).
The cost of this corridor is estimated at ₹23,136 crore (equivalent to ₹280 billion or US$3.45 billion in 2020). The original deadline for the project was 2016, but it is currently expected to be completed only by Dec 2023 due to Covid delays.
Upon completion, it will have interchanges with the planned Line 6 at SEEPZ, Line 1 at Marol Naka, Line 2 at BKC, Central Line at Chhatrapati Shivaji Terminus, Mumbai Monorail at Mahalaxmi (Jacob Circle), and Western Line at Mahalaxmi, Mumbai Central and Churchgate.
57% of the funds needed for this project are being sourced as multilateral debt from JICA.
Expected Cost: ₹23,136 crore
Expected Daily Ridership: 17 Lakh (1,700,000)
Rolling Stock: Alstom
Main article: Line 4 (Mumbai Metro)
The line 4 of Mumbai Metro is envisaged to be a 32.32 km (20.08 mi) long elevated corridor, covering 32 stations from Kasarvadavali (near Thane) in the north to Wadala in the south. It is estimated to cost ₹14,549 crore (equivalent to ₹170 billion or US$2.17 billion in 2020). This project will help connect the city of Thane with Mumbai with an alternate mode of public transport.
The line was approved by the Maharashtra Government on 27 September 2016, and construction work on this line began in mid 2018.
The construction of viaducts and stations is being executed by consortium of Reliance-Astaldi JV and Tata Projects-CHEC JV.
The Asian Infrastructure Investment Bank has extended a multilateral loan of ₹3,916 crore (equivalent to ₹47 billion or US$584.47 million in 2020) for this project. It is expected to get completed by 2025.
Expected Cost: ₹15,498 crore
Expected Daily Ridership: 13.4 Lakh (1,340,000)
Main article: Line 5 (Mumbai Metro)
The 24.9 km-long Thane-Bhiwandi-Kalyan Metro-V corridor will have 17 stations and will cost ₹8,416 crore. It will be an elevated corridor. It will connect Thane to Bhiwandi and Kalyan in the eastern suburbs, with further extension to Taloja in Navi Mumbai that is line 12.
The stations include Kapurbawdi in Thane (West), Balkum Naka, Kasheli, Kalher, Purna, Anjur Phata, Dhamankar Naka, Bhiwandi, Gopal Nagar, Temghar, Rajnouli Village, Govegaon MIDC, Kongaon, Durgadi Fort, Sahajanand Chowk, Kalyan railway station and Kalyan APMC.
The line was approved by Chief Minister Devendra Fadnavis on 19 October 2016.The 12.811 km Thane – Bhiwandi section is under construction. Bhiwandi – Kalyan is on-hold (route modification in progress)..The corridor is being constructucted by Afcons in one package from Kalyan to Bhiwandi including 7 stations.
Expected Cost: ₹8,417 crore
Expected Daily Ridership: 3 Lakh (300,000)
Main article: Line 6 (Mumbai Metro)
The 14.47 km long Lokhandwala-Jogeshwari-Vikhroli-Kanjurmarg Metro-VI corridor will have 13 stations and cost ₹6,672 crore. It will be an elevated corridor. It will connect Lokhandwala Complex in Andheri in the western suburbs to Vikhroli and Kanjurmarg in the eastern suburbs.
The stations include Lokhandwala Complex, Adarsh Nagar, Momin Nagar, JVLR, Shyam Nagar, Mahakali Caves, SEEPZ Village, Saki Vihar Road, Ram Baug, Powai Lake, IIT Powai, Kanjurmarg (W), Vikhroli-Eastern Express Highway.
Metro 6 will provide interchange with Metro 2 at Infinity Mall in Andheri, with Metro 3 at SEEPZ, with Metro 4 and the Mumbai Suburban Railway at Jogeshwari and Kanjurmarg, and with Metro 7 at JVLR.
The line was approved by Chief Minister Devendra Fadnavis on 19 October 2016. The MMRDA issued a tender to conduct a detailed aerial mapping survey of the alignment in April 2017. Authorities will also be able to determine the location of trees along the alignment accuracy of up to 10 cm utilizing a differential GPS (DGPS), while a digital aerial triangulation system will help determine the types of trees, their heights and diameters.
Line-6’s first section is expected to open in 2025.
The construction of viaduct and station work is being executed by J Kumar Infraprojects and MBZ-EIIL JV.
Expected Cost: ₹6,672 crore
Expected Daily Ridership: 7.2 Lakh (720,000)
Main article: Line 7 (Mumbai Metro)
This corridor is 16.475 km (10.237 mi) long, and runs from Dahisar (East) in the north to Andheri (East) in the south, with a further extension till Bhayander in the north, and Mumbai International Airport Terminal 2 in the south. The line is partially elevated (under construction, with completion slated for 2019), and partially underground (approved, with construction planned to begin in 2018).
The elevated section is expected to cost ₹6,208 crore (equivalent to ₹76 billion or US$949.62 million in 2020), while the outlay for the recently approved underground section is ₹600 crore (equivalent to ₹715 crore or US$89.55 million in 2020). Civil works, including viaduct and station works, is being executed by NCC, Simplex Infrastructure, and J. Kumar Infraprojects. The corridor is partially operational since April 2, 2022 and fully operational since January 19, 2023.
The corridor is being funded through multilateral debt to the tune of ₹2,246 crore (equivalent to ₹27 billion or US$335.22 million in 2020) by Asian Development Bank. The cost of the 13.5 km extension till Bhayander in the north is expected to be around ₹3,600 crore (equivalent to ₹43 billion or US$537.30 million in 2020).
Expected Cost: ₹6,208 crore
Expected Daily Ridership: 6.7 Lakh (670,000)
Rolling stock: BEML
Main article: Line 8 (Mumbai Metro)
This is a proposed metro line between the Chhatrapati Shivaji Maharaj International Airport and the under construction Navi Mumbai International Airport. It will connect Mumbai airport to upcoming Navi Mumbai airport • and its length would be approx 32 km.
Expected Cost: ₹15,000 crore approx.
Expected time of completion: October 2026
Expected Daily Ridership: 3 Lakh (300,000)
Extension of Line 7 (Red Line)
Main article: Line 9 (Mumbai Metro)
Metro line 9 will ply between Dahisar-Mira Bhayander route. It will have 10 stations all elevated. This Under Construction Metro of Dahisar to Mira-Bhayandar will cut down approximately 30 km of travel distance between the Mira-Bhayandar and Mumbai suburbs. It is an extension of Line 7.
Expected time of completion: 2024
Expected Daily Ridership: 4.4 Lakh (440,000)
Rolling stock: BEML
Extension of Line 4 (Green Line)
Main article: Line 10 (Mumbai Metro)
In February 2017, the MMRDA announced that the DMRC was preparing a detailed project report (DPR) on Metro 10, a proposed 9 km elevated extension of Metro 4 from Gaimukh to Chatrapati Shivaji.
The project is estimated to cost ₹3,908 crore (US$490 million) with an estimated ridership of 2.5 lakh (250,000). It will be completed by 2025.
Extension of Line 4 (Green Line)
Main article: Line 11 (Mumbai Metro)
In November 2018, the MMRDA cleared the Metro 11, which connects Wadala with CSMT. This would be considered to be an extension to Metro 4. The length of the line is 11.4 km, and it proposed to cost ₹8,739 crore (US$1.207 billion). The line will be partially underground, with 8 underground and 2 elevated stations. It will be completed by October 2026.
Extension of Line 5 (Orange Line)
Main article: Line 12 (Mumbai Metro)
MMRDA has planned the Metro 12, which will connect Kalyan with Taloja. It is an extension of line 5. In another boost to connectivity, the Mumbai Metropolitan Region Development Authority (MMRDA) has decided to connect Mumbai, Thane and Navi Mumbai with a Metro line. The estimated cost of the project is ₹5,865 crore and construction began in August 2020. It will be completed by October 2024.
It is a proposed metro project to connect Mira Road with Virar. The project length is 23 km and the estimated cost of the project is ₹6,900 crore.
The DPR is created for this route This line will be operational by October 2026.
It is an approved metro project to connect Vikhroli with Kanjurmarg and further to Ambernath-Badlapur. It will have an intersection at Kanjurmarg with Line 6, the Pink Line. This project is now at the DPR stage. The project length is 45 km and the estimated cost of the project is ₹13,500 crore. It will be completed by October 2026.
Reliance Infrastructure consulted a number of major international rolling stock builders to provide the train fleet for the Mumbai Metro. Bidders for the contract included established metro-vehicle manufacturers such as Kawasaki, Alstom, Siemens and Bombardier, but CRRC Nanjing Puzhen of China was ultimately chosen to supply rolling stock for ₹600 crore. In May 2008, CSR Nanjing completed the first 16 trains, each comprising four cars. The first ten trains were reported to be ready for operation in January 2013.
The coaches are fire retardant, air-conditioned and designed to reduce noise and vibration, and will feature both high seating capacity and ample space for standing passengers. They will be outfitted with a number of features for safety and convenience, including LCD screens, 3D route maps, first-aid kits, wheelchair facilities, fire-fighting equipment and intercom systems permitting communication with the train driver. Each coach will furthermore feature a black box to assist in accident investigations. The trains will be capable of carrying over 1,100 passengers in a four-car unit, with each carriage being approximately 2.9 metres (9.5 ft) wide.
In 2018, the Mumbai Metro Rail Corporation chose Alstom to supply 31 eight car trains for Aqua line (line 3). The trains will be capable of driverless operations and will be built at Alstom's factory in Sri City, Andhra Pradesh.
In 2018, Mumbai Metropolitan Region Development Authority which will operate all metro lines except Line 3, awarded a tender to Bharat Earth Movers Ltd. (BEML) to supply 63 trainsets (378 coaches) for Yellow Line (Line 2) and Red Line (Line 7) at a cost of ₹3,015 crores ($427.33 million). Capable of driverless operations, the trains are manufactured at BEML's factory in Bengaluru and first rake For Yellow Line arrived in Mumbai on 27 January 2021, and will continue to receive the rest of the rakes till 2022. Recently on 17 January 2021, Bombardier won the tender to supply 234 driverless coaches for Green Line (Line 4) of six-car configuration for Mumbai metro. However, the contract has been cancelled in March 2022 due to delays and uncertainties of the project.
Unlike 97% of metro corridors worldwide which run on direct current (DC), the Mumbai Metro runs on alternating current (AC) which is more labour and cost-intensive. MMRDA joint project director Dilip Kawathkar stated that AC power was chosen "after a proper study by a team of experts" which found that the AC model was "a better option". Bidders for Line 3 were reportedly in favour of the DC model. Experts believe that the decision to use AC will escalate the project cost of underground lines by 15%, since more digging is required for the rail to work on AC.
The Mumbai Metro will feature an advanced signalling system, including an automatic train protection system (ATPS) and automated signalling to control train movements on the 11-kilometre (6.8 mi) Line 1. A four-minute service interval is anticipated on the route.
Siemens will supply the signalling systems required for the project, while Thales Group will supply the Metro's communication systems. The network's signalling and train control systems will be based on LZB 700M technology.
On 21 October 2019, exactly after 1,960 days (approx. 5 years) of Mumbai Metro Line 1's inception, the system crossed 60 crore passengers, with an average daily ridership of around 4,50,000 (4.5 lakh) passengers.