Purple Line (Kolkata Metro)

"Kolkata Metro Line 3" redirects here. For other uses, see Line 3.

Purple Line is a rapid transit metro line of the Kolkata Metro in Kolkata, West Bengal, India. A 6.5 kilometres (4.0 mi) stretch from Joka to Taratala of this line was inaugurated on 30 December 2022^[3][4] and after extended to Majerhat on 6 March 2024.^[5] This line will span 26.88 kilometres (16.70 mi) from IIM-Joka in the south to Eden Gardens in the north.^[6] It has interchange with Blue Line at Park Street in central Kolkata and run parallel with Blue Line up to Esplanade where it has an interchange with Green Line. It is being built by Rail Vikas Nigam Limited.

Purple Line
Overview
Status	Phase 1 - Operational Phase 2 - Under Construction
Owner	Indian Railways
Locale	Kolkata Metropolitan Region, India
Termini	Eden Gardens (North) IIM-Joka (South)
Connecting lines	Blue Line Green Line
Stations	Operational: 7 Under construction: 5 Approved: 2
Website	Indian Railways
Service
Type	Rapid transit
System	Kolkata Metro
Operator(s)	Metro Railway, Kolkata
Depot(s)	Joka Metro Depot
Rolling stock	Two ICF Medha rakes: MR417, MR418.
Daily ridership	1200
History
Opened	30 December 2022; 2 years ago (2022-12-30)
Last extension	6 March 2024; 13 months ago (2024-03-06)
Technical
Line length	26.88 km (16.70 mi)[1] Operational: 7.75 km (4.82 mi) Under construction: 7.33 km (4.55 mi) Approved: 3.3 km (2.1 mi) Planned: 8.5 km (5.3 mi)
Number of tracks	2
Character	elevated and underground
Track gauge	5 ft 6 in (1,676 mm) broad gauge
Electrification	750 V DC using third rail[2]
Operating speed	80 km/h (50 mph) (designed) 55 km/h (34 mph) (commercial)
Signalling	CBTC signalling system
Route map Legend Eden Gardens Green Line to Howrah Maidan Blue Line to Dakshineswar     Green Line to Teghoria Esplanade Park Street Blue Line to Kavi Subhash Victoria Tolly Canal Khidirpur Mominpur Majerhat Taratala Behala Bazar Behala Chowrasta Sakher Bazar Thakurpukur Joka Joka depot IIM-Joka Diamond Park

Background and history

Joka to Mominpur (Elevated) Corridor, Mominpur to Esplanade (Underground) Corridor

Previously, the stretch from Thakurpukur to Majerhat was surveyed as a branch line of the circular railway, and a metro line from Majerhat to Dakshineswar via Sealdah (interchange with Green Line) was planned.^[7] This plan was scrapped and a new metro line from further south in Joka to BBD Bagh was sanctioned in 2010–2011 with a total length of 17.22 km (10.70 mi) at an anticipated cost of ₹2,619.02 crore (equivalent to ₹59 billion or US$690 million in 2023). Later the route was truncated to Esplanade. The corridor runs along Diamond Harbour Road, Khidirpur Road, and Jawaharlal Nehru Road, major arterial roads of Kolkata, and has passenger interchange facilities with the Blue Line and Green line at Esplanade and Blue line at Park street. The proposed Esplanade station will not be the same as that of the Blue Line and Green Line but a different station that will be built at B.C. Roy market ground. The line now has a new depot in Joka. Due to land acquisition problems^[7] and objections from the Ministry of Defence, construction has been delayed several times since the beginning.^[8] Defence Ministry objected that the elevated corridor would overlook the Eastern Command headquarters at Fort William, Ordinance Depot at Mominpore. The change in alignment from elevated to underground increased the construction cost of the stretch from ₹139 crore (equivalent to ₹164 crore or US$19 million in 2023) to ₹3,000 crore (equivalent to ₹35 billion or US$410 million in 2023).^[9] The work resumed in several phases and new bids were invited by Rail Vikas Nigam Limited (RVNL) in April 2020.^[10][11][12] It is India's first metro line to run on indigenous head hardened rails, manufactured by Jindal Steel & Power.^[13] The extension of this line to IIM and Diamond Park for 2 km (1.2 mi) was sanctioned in the 2012–2013 Budget at a cost of ₹294.49 crore (equivalent to ₹555 crore or US$65 million in 2023). The work is being executed by RVNL.^[14]

The Mominpur metro station was planned to be built across a 2500 sq. m area. However, the Ministry of Defence objected to the elevated structure, saying that it would overlook the Ordnance depot. This forced RVNL to stall the entire project, and RVNL almost dropped the station from the plan even though it alone would have a projected 20,000 passengers during peak hours. Underground Mominpur station was also not possible due to the sharp gradient from Taratala metro station.^[15] After a series of discussions and consultations with the Ministry of Defence and Government of West Bengal in 2016, it was decided to shift the station around 1 km (0.62 mi) northward, near the Alipore Bodyguard Lines.^[16] But, after a year Defence Ministry approved the Mominpur metro station in its original location as the change in alignment would have delayed the project and budget overrun. It will be the last elevated station of the corridor.^[15][17] Now, the proposed underground Khidirpur metro station is planned at the Alipore Bodyguard Lines.^[18] There were also hurdles regarding clearance for tunneling under defence lands.^[16] In 2020, the Defence Ministry eased out the process as lease rent wasn't required anymore for tunneling as long the overground ownership of the land did not change.^[9] On 30 December 2022 the Joka - Taratala section and on 6 March 2024, the Taratala - Majerhat section was inaugurated remotely by Honourable Prime Minister Narendra Modi, completing the 7.75 km Phase 1 stretch.

On 12 January 2025, it was reported that Metro authorities decided to extend the line to Eden Gardens instead of Esplanade to facilitate commuters and connect Strand Road, BBD Bag and Calcutta High Court.^[19] Subsequently, in March 2025 railways sanctioned ₹1,000 crore (equivalent to ₹19 billion or US$220 million in 2023) for the extension.^[20]

On 25th March, 2025, The Times of India reported that Metro railway sent a proposal to Ministry of Railways to extend the Diamond Park Branch to Tollygunge, which will be 8.5 km (5.3 mi) long.^[21] In this route three underground station at Thakurpukur Cancer Hospital, Ramchandrapur and Panchanantala will come.^[22]

Development

Prime Minister Narendra Modi inaugurates the Joka-Majerhat stretch of Purple Line of Kolkata Metro on December 30, 2022.

Around 8.5 kilometres (5.3 mi) of the project will be elevated and the rest of 6.32 kilometres (3.93 mi) of the metro line will be underground.^[4] The project is getting delayed due to nonavailability of land for the construction of train depot at Joka. In 2019, RVNL was given the land required for building the depot and the construction for its boundary wall and land development started in February 2019.^[23] Tenders for its construction and plant & machinery were invited in April 2020.^[24]

Construction was further delayed in September 2018 due to the Majerhat Bridge collapse, the metro was being built right next to the bridge.

Tender for Majherhat to Esplanade underground section has been floated in 1st week of December 2019.

By 15 September 2022, the stretch from Joka to Taratala has been fully constructed and electrification has been done. Testing trials are underway from Joka to Taratala using the old decommissioned Metro Rakes. Eventually in service there will be new air conditioned metro rakes. The stretch from Majerhat to Esplanade is under construction.

Prime Minister Narendra Modi inaugurated the Joka-Taratala stretch, including Joka metro station of Kolkata Metro's Purple Line on 30 December 2022 in the presence of West Bengal Chief Minister Mamata Banerjee and Indian Railway Minister Ashwini Vaishnaw. Some students from schools especially St Thomas Boys School, whose premises are utilised for planned Khidirpur metro station in this stretch, were granted the rare opportunity to be the first ones to ride in this Joka-Taratala stretch after the inauguration.^[25][26][27]

After lot of hardships and developmental work the Taratala–Majerhat section of Kolkata Metro Purple Line was inaugurated on 6 March 2024 by Prime Minister Narendra Modi, along with the truncated sections of Esplanade–Howrah Maidan under Green Line and Kavi Subhash–Hemanta Mukhopadhyay under Orange Line.^[28][29]

List of stations

Main article: List of Kolkata metro stations

The work has been sanctioned in 2010-11 for the new Metro line from Joka to B.B.D. Bagh for a length of 16.72 km (10.39 mi) at an anticipated cost of Rs. 2619.02 Crores. But, later the route was shortened and planned to terminate at Esplanade. A separate Depot was built by RVNL in Joka. The tender has gone to Simplex Infrastructures. The extension of this line to IIM and Diamond Park for 2 km (1.2 mi) has been sanctioned in the Budget of 2012–13 at a cost of Rs. 294.49 Cr. Another extension from Esplanade to Eden Gardens has been sanctioned on March 2025 by Ministry of Railways at a cost of Rs. 1000 Cr. The execution of this work has been entrusted to RVNL.

There are 4 phases in this line-

• Joka to Majherhat (Operational)
• Majherhat to Esplanade (Under construction), Esplanade to Eden Gardens (planned)
• IIM-Joka to Joka (planned).
• IIM-Joka to Diamond Park (planned), Diamond Park to Mahanayak Uttam Kumar (Proposed)

Purple Line (Main)
No.	Station Name		Location	Phase	Opening	Connections	Layout	Coordinates	Notes
	English	Bengali
1	IIM-Joka	আইআইএম জোকা	Joka	3	Approved, but construction not started[30]	Vivekananda Mission School Bus Stop	Elevated
2	Joka	জোকা	Joka	1A	Operational	Joka bus Depot Diamond Park Bus Stop	Elevated		Also known as Diamond Park
3	Thakurpukur	ঠাকুরপুকুর	Thakurpukur			Thakurpukur Police Station Bus Stop Thakurpukur Bazar Bus Stand
4	Sakher Bazar	সখেরবাজার	Behala			Thakurpukur Bus Depot Silpara Bus Stop Behala Sakherbazar Minibus Stand Kadamtala Bus Stand			Also known as Silpara
5	Behala Chowrasta	বেহালা চৌরাস্তা				Behala Chowrasta Bus Stand
6	Behala Bazar	বেহালা বাজার				Behala Bazar Bus Stop
7	Taratala	তারাতলা	Taratala			Ajanta Cinema Bus Stop Taratala Bus Stand			Also known as Pathakpara
8	Majerhat	মাঝেরহাট	Majerhat	1B		Majerhat Station DH Road Mint Bus Stop Majherhat Gurudwara Bus Stop
9	Mominpur	মোমিনপুর	Mominpore	2A	Under Construction	Mominpore Bus Stop	Elevated
10	Khidirpur	খিদিরপুর	Kidderpore	2B		Khidderpore Bus Stop	Underground
11	Victoria	ভিক্টোরিয়া	Maidan			Victoria Memorial Bus Stop PG Hospital Bus Stop Birla Planetarium Bus Stop			Also known as Hastings
12	Park Street	পার্ক স্ট্রিট	Park Street			Blue Line • Park Street (U/C) ---- Park Street Bus Stop
13	Esplanade	এসপ্ল্যানেড	Esplanade			Blue Line • Esplanade Green Line • Esplanade ---- Esplanade Bus Terminus (WBTC,SBSTC,NBSTC) Esplanade Tram Depot			International Bus Terminus. Also known as Dharmatala / Chowringhee
14	Eden Gardens	ইডেন গার্ডেনস	Babughat	2C	Approved[31]	Eden Gardens Eden Gardens Bus Stop Babughat Bus Stop

Purple Line (Branch)[32][33]
No.	Station Name		Location	Phase	Opening	Connections	Layout	Coordinates	Notes
	English	Bengali
1	IIM-Joka	আইআইএম জোকা	Joka	3	Approved, but construction not started[34]	Vivekananda Mission School Bus Stop	Elevated
2	Diamond Park	ডায়মন্ড পার্ক		4	Approved
3	Ramchandrapur	রামচন্দ্রপুর	Ramchandrapur		Proposed		Underground
4	Thakurpukur Cancer Hospital	ঠাকুরপুকুর ক্যান্সার হসপিটাল	Thakurpukur			Thakurpukur Cancer Hospital Bus Stop
5	Panchanantala	পঞ্চাননতলা	Panchanantala
6	Mahanayak Uttam Kumar	মহানায়ক উত্তম কুমার	Tollygunge		Operational	Blue Line Tollygunge Tram Depot Tollygunge Bus Depot Tollygunge Tram Depot Bus Stop	At grade

Gallery

• 
  ICF Medha rake MR 418 on the day of inauguration of Purple Line at Joka metro station
• The day of inauguration of phase 1

See also

• List of Kolkata metro stations
• Kolkata Metro Rolling Stock
• 2018 Kolkata bridge collapse
• Kolkata Suburban Railway