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The Mumbai Metro is a rapid transit (MRT) system serving the city of Mumbai and the wider Mumbai Metropolitan Region in Maharashtra, India. While the Maharashtra Metro Rail Corporation Limited is responsible for all metro rail projects being developed in Maharashtra, except for those in the Mumbai Metropolitan Area, the Mumbai Metropolitan Region Development Authority is the authority responsible for maintaining the metro system in the Greater Mumbai area. The rapid transit metro 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. The Mumbai Metro is the sixth longest operational metro network in India with an operational length of 46.4 km (28.8 mi) as of January 2023. When completed, the core system will comprise sixteen high-capacity metro railway lines, spanning a total of more than 523 kilometres (325 mi) and serviced by 350 stations. Line 1 of the Mumbai Metro Line 1 is operated by Mumbai Metro One Private Limited (MMOPL), a joint venture between Reliance Infrastructure (50%), Mumbai Metropolitan Region Development Authority, (50%) and formerly by RATP Dev Transdev Asia(5%) and Hong Kong MTR. While lines 2, 4, 6, 7, 5 and their extensions will be built by the Mumbai Metropolitan Region Development Authority (MMRDA), the completely underground Line 3 and Line 11 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, 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, this Line is called Purple Line 13. 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 commenced operations on 8 June 2014. Many metro projects were being delayed because of late environmental clearances, land acquisition troubles and protests. After nearly eight years, another two new metro corridors, 2A and 7, were inaugurated, which are now fully operational. New Metro flagged off the new metro lines 2A and 7 on 2 April 2022. The minimum fare is ₹10 for 3 km (1.9 mi), and the maximum fare is ₹50 for 30 km (19 mi). Additionally, there are 9 other metro lines currently under construction in the city.