Line 4 (Mumbai Metro)

Mumbai Metro Green Line 4
Overview
Status	Line 4 (under construction) Line 4A (under construction) [1]
Owner	MMRDA
Line number	4
Locale	Mumbai and Thane, Maharashtra, India
Termini	Gaimukh and Kasarvadavali Wadala
Stations	32 + 2 extended 34
Website	Line 4
Service
Type	Rapid Transit
System	Mumbai Metro
Operator(s)	MMRDA
Depot(s)	Mogharpada
History
Planned opening	December 2025;1 year's time (2025-12) [2]
Technical
Line length	32.32 km (Line 4) 2.7 km (Line 4A)
Number of tracks	2
Character	Elevated
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge
Operating speed	90 km/h (56 mph)
Highest elevation	3.90 m (12.8 ft)
Route map Legend Line 4 to Line 10 0.0000 Gaimukh Mogharpada Depot 1.2830 Gowniwada 2.6679 Kasarvadavali 3.7414 Vijay Garden 4.6502 Dongripada 6.1158 Tikuji-ni-wadi 6.8914 Manpada (Thane) 7.7567 Kapurbawdi on Line 5 9.1459 Majiwada 9.9701 Cadbury Junction 10.7628 Mahapalika Marg 11.7987 RTO Thane 12.4772 Teen Haath Naka (Thane) 13.7135 Mulund Naka 15.0615 Mulund Fire Station 16.1744 Sonapur 17.5651 Shangrila 18.4087 Bhandup Central line 19.4575 Bhandup Mahapalika 20.2368 Naval Housing 20.9286 Gandhi Nagar (Kanjurmarg) Kanjurmarg on Central line Kanjurmarg (West) on Line 3 and Line 6 21.9307 Surya Nagar 22.9354 Vikhroli 23.6585 Godrej Company 24.8213 Shreyas Cinema Central line 25.4421 Laxmi Nagar 26.5196 Pant Nagar 28.1522 Garodia Nagar 28.7507 Amar Mahal Junction Santacruz–Chembur Link Road Harbour line 30.0942 Siddharth Colony Line 2 31.1486 Suman Nagar Kurla–Mahul BP Refinery line 32.2269 Anik Nagar Bus Depot 33.0885 Wadala Truck Terminal 34.0885 Bhakti Park (Wadala) on Line 1 (Mumbai Monorail) to Line 11

Line 4 (Green Line) of the Mumbai Metro is an under-construction rapid transit line in Mumbai, Maharashtra, India.

The Mumbai Metropolitan Region Development Authority (MMRDA) and a consortium of international companies are developing the line. ^[3]

The 32.32 km (20.08 mi) line is planned to be fully elevated, and is expected to consist of 32 stations from Wadala (Mumbai) to Kasarvadavali (Ghodbunder road, Thane) via Chembur, Bhandup Mulund and Teen Hath Naka, a popular traffic crossing in Thane. It is estimated to cost ₹14,549 crore. ^[4] Its construction was expected to begin by June 2018.

Alstom was initially chosen to provide rolling stock for the line, but the contract was cancelled in 2022. ^{[5] [6]}

Planning

In June 2015, the Mumbai Metropolitan Region Development Authority (MMRDA) proposed building a 32 km Wadala-Thane-Kasarvadavali metro line as part of a plan to build six new metro lines at a total estimated cost of ₹64,000 crore (US$8.0 billion). ^[7] Line 4 was approved in June 2016, ^[8] and was estimated to cost ₹14,549 crore (US$1.8 billion). ^[9]

The foundation stone for Metro 4 was laid by Prime Minister Narendra Modi on 24 December 2016. ^[10] The Maharashtra Coastal Zone Management Authority granted Coastal Regulation Zone (CRZ) clearance to the project in February 2017. Over 1 km (0.62 mi) of the line passes over water bodies in Bhakti Park and Wadala, both areas classified as CRZ II, where regulations limit construction activities. A total of 48 piers are proposed to be built in the CRZ II zone. The MMRDA proposed building metro car depots for the line on a 30 hectare plot at Owala village in Thane district and another in Vikhroli. ^[11] The agency stated that the line would require two depots due to its length. ^[12]

The MMRDA used a drone to carry out survey work for Metro 4. The drones were fitted with 360 degrees camera that provide up to 3 millimetres (0.12 in) accuracy. The aerial survey takes less time than a regular survey, achieves greater accuracy and helps protect against false claims for compensation. ^[13] In February 2017, the MMRDA said it was studying the feasibility of extending the corridor from Kasarvadavali to Gaimukh. ^[14] In March 2017, the agency said that it was conducting a pre-feasbility study on extending the line from Wadala to Mumbai General Post Office in South Mumbai, via the Mumbai Port Trust. The proposed 8 km (5.0 mi) extension is estimated to cost ₹300 crore per kilometer. ^{[15] [16]} The extension from Kasarvadavli to Gaimukh was approved by Fadnavis at the 144th meeting of the MMRDA on 12 January 2018. The 2.7 km extension is estimated to cost ₹949 crore (US$120 million). ^{[17] [18]}

The MMRDA appointed Systra MVA Consulting India Pvt. Ltd. as the detail design consultants for Line 4 on 9 November 2017. ^[19] A consortium of DB Engineering, Louis Berger and Hill International was awarded a project management and construction management services contract for the Metro 4 project in April 2018. ^{[20] [21]} In October 2018, the MMRDA announced that it would construct Metro 4 along with three flyovers to minimize traffic disruption, with the metro running on the upper deck of the flyover. The three flyovers will be built at Bhayander Pada, Kasarvadavli and Anandnagar near Ghodbunder. ^{[22] [23]}

In May 2019, MMRDA Metropolitan Commissioner R.A. Rajeev announced a modified plan to use Siddharth Colony as the interchange station with Line 2. The original plan had proposed to use the Eastern Express Highway station on Line 2B and Siddharth Colony on Line 4 as the interchange stations. However, the two stations are approximately 480 metres away from Siddharth Colony and the change was made to simplify passenger transfers. ^[24]

Depot

The MMRDA considered plots in Wadala, Aarey Colony and Gaimukh Nagar in Thane to build a depot for the line. ^[25] On 16 October 2023, the state urban development allotted a 174 hectare (435 acre) plot of land at Mogharpada in Thane to the MMRDA at no cost. Nine hectares of the plot is reserved for use by the BMC for the Coastal Road and a further 29 hectares is protected mangrove land. The MMRDA will utilize a portion of the remaining plot to build a depot that serves Lines 4, 10 and 11. The land left over after building the depot is zoned for residential and commercial use. ^{[26] [27]}

Construction

A construction barricade along the Line 4 route

The MMRDA invited bids for civil work on the corridor on 4 January 2017. ^{[28] [29] [30]} The tenders for construction of viaducts and stations were divided into five packages - Wadala to Amar Mahal Junction, Garodia Nagar to Surya Nagar, Gandhi Nagar to Sonapur, Mulund Fire Station to Majiwada and Kapurbawdi to Kasarvadavali. ^{[31] [32]} Metro 4 was tendered alongside Metro 2B. L&T, Afcons Infrastructure, Tata, NCC and JMC, Reliance Infrastructure-RdE, JKumar Group, ITD Cementation, CHEC-TPL bid for packages on both Metro 2B and Metro 4. A total of 10 firms and/or consortia submitted bids for the two lines, two of whom (Simplex Infrastructure and a consortium of GHEC-RCC-JV-China) bid exclusively for Metro 2B packages. ^{[33] [34]}

The construction work was awarded through the engineering, procurement and construction (EPC) model in April 2018. A joint venture between Reliance Infrastructure and Italian firm Astaldi S.p.A. was awarded three packages between Kasarwadavali and Wadala worth ₹1,584 crore (US$200 million). ^[35] The contract for the remaining two packages, worth a combined ₹1,048 crore (US$130 million), was awarded to a joint venture between Tata Projects Limited and China Harbour Engineering Company. ^[36] The civil work was expected to be completed in 30 months. ^[37] Construction began in October 2018. ^[38] About 80% of soil-investigation works and 66% of utility works had been completed by 3 June 2019. ^[39]

In September 2019, the MMRDA awarded a ₹342 crore (US$43 million) contract to J Kumar Infraprojects to build the viaduct and two stations for the Metro 4A extension from Kasarvadavli to Gaimukh. ^{[40] [41]} In August 2020, the Bombay High Court granted the MMRDA permission to carry out construction in a mangrove buffer zone. ^[42] Survey work on the land for a depot at Mogharpada began in January 2022. ^[43]

The MMRDA stated that 37% of total work on Lines 4 and 4A had been completed by June 2022. The agency stated that 43.44% of viaducts and 25.20% of work on stations on Line 4 had been completed. On Line 4A, 39.03% of viaducts and 19.82% of work on stations was completed. ^[44] By November 2022, 41% of civil works on Line 4 and 45% of work on Line 4A had been completed. ^{[45] [46]}

The Bombay High Court dismissed two petitions filed by Indo Nippon Chemical Co. Ltd. and Shree Yashwant Co-operative Housing Society Ltd. challenging the alignment for Line 4 in March 2023. ^[47] In September 2023, the MMRDA awarded a ₹905 crore (US$110 million) contract to a joint venture between SEW Infrastructure and Vishwa Samudra Engineering to build the depot at Mogharpada. It also awarded a ₹121 crore (US$15 million) to Apurvakriti Infrastructure Pvt Ltd. lay ballastless railway tracks connecting Mulund Fire Station with Gaimukh and the depot. ^[48]

Sl No.	Package	Contractor(s)
1	Wadala to Amar Mahal (6.2 km Viaduct & 6 Stations)	Reliance-Astaldi JV
2	Garodia Nagar-Surya Nagar (6.4 km Viaduct & 7 Stations)	TPL-CHEC JV
3	Gandhi Nagar-Sonapur (6.7 km Viaduct & 6 Stations)	Reliance-Astaldi JV
4	Mulund Fire Station-Majiwada (7.1 km Viaduct & 7 Stations)	TPL-CHEC JV
5	Kapurbawdi-Kasarvadavali (6.8 km Viaduct & 6 Stations)	Reliance-Astaldi JV
6	Kasarvadavali to Gaimukh (2.7 km Viaduct & 2 Stations)	J Kumar Infraprojects Limited

Current status

Status as of 21 May 2023 [49]
Sr. No.	Name of Work	Current Status
1	Pile	89.2%
2	Pile Cap	74.8%
3	Pier(Viaduct+Station up to CL)	64.9%
4	Anti Crash Barrier	56.3%
5	Road Restoration	30.2%
6	Pier Cap Casting	73.6%
7	Pier Cap Erection	67.6%
8	Stitch Concrete	66.7%
9	Stressing	58.8%
10	Bearing Pedestal	56.1%
11	U-Girder Casting for Viaduct	73.1%
12	U-Girder Erection for Viaduct	61.4%
13	I-Girder Casting for Viaduct	27.1%
14	I-Girder Erection for Viaduct	25.5%
15	Deck Slab Over I Girder	25.9%
16	U Girder Casting For Station	37.2%
17	U Girder Erection For Station	31.3%
18	Cast in Situ Pier Head for Station (Concourse level)	59.4%
19	Concourse Level Pier Arm Casting	57.4%
20	Concourse Level Pier Arm Erection	39.8%
21	Platform Level Pier Arm Casting	57.5%
22	Platform Level Pier Arm Erection	50.2%
23	Station L Girder Casting	29.3%
24	Station L Girder Erection	27.0%
25	Station T Girder Casting	36.5%
26	Station T Girder Erection	30.3%
27	Platform Level RCC Beam Casting	29.2%

Green Line 4

On 12 April 2023, MMRDA in press release stated that Green Line 4 project status is 49%. ^[50]

Green Line 4A

On 30 December 2022, MMRDA in press release stated that Green Line 4A project status is 45%. ^[51]

History of Previous Works and Status
Sr. No.	Name of Work	Description	Status as of [49]
			21 May 2019	4 July 2019	6 August 2019	21 October 2019	29 November 2019	29 January 2020	8 September 2020	1 January 2021	1 March 2021	31 May 2021	28 July 2021	18 April 2022	30 June 2022	1 September 2022
1	Soil Investigation Works	Soil Investigation Work For Pier Foundation Completed	78%	81.0%	82.0%	83.0%		85%	87%		90%		93.20%	90%
2	Utility Works	Works Completed	64%	68.2%		70%		71.36%	76%		85%	86%
3	Piling Works	Piling Work For Foundations Completed	17%	22.7%	25.25%	33%	37%	42.56%	55.15%	62.40%	65%	66%	67.78%	65%	69%	69%
4	Pile Cap Works	Pile Cap Work Completed	6.5%	12.4%	14.7%	18.60%	21%	24.75%	35.68%	44.85%	49%	52%	51.73%	51.91%	54%	54%
5	Pier Works	Piers Cast	3.5%	8.0%	10.2%	15.70%	18.3%	29.23%	29.29%	38.16%	42%	45%	45.92%	46.80%		49%
6	Pier Cap Works	Pier Caps Cast	Nil	Casting of Pier Cap is started at casting yard and 0.063% casting completed till June 2019	Casting of Pier Cap is started at casting yard and 0.068% casting completed till July 2019	6% Casting completed.	10%	17.98%	28.99%	40.59%	43%	46%	49.73%	49.36%	51%	57.19%
		Pier Caps Erected	Nil			0.80% Erection completed.	2.4%	23.34%	23.81%	31.33%	36%	39%	42.65%	45.06%	46%	46.92%
7	Cast-in-situ Pier Cap		Nil												89%	89.19%
8	U Girder Casting	Casting yard works are in progress	Nil	Casting of U Girder started at casting yard and 0.21% casting completed till June 2019	Casting of U Girder started at casting yard and 0.41% casting completed till July 2019	2.33%	6%	11.83%	20.09%	33.19%	38%	45%	38.13%	38.71%	40%	43.68%
		U Girder Erected	Nil					0.9%	15.69%	29.97%	24%	31%	26.27%	27.86%	32%	36.63%
9	I Girder Casting		Nil										8.83%	19.09%	21%	24.98%
10	I Girder Erection		Nil											17.21%	19%	22.42%
11	Desk Slab		Nil											14.58%	18%	21.20%
12	Station work	Station work in progress	Pile Foundation works Started since last month						Works are in Progress
		Station Pier Head	Nil												37%	40.96%
		Stn Pier up to Platform level	Nil												35%	40.96%
13	Concourse Pier Arm Casting		Nil												40%	43.86%
14	Concourse Pier Arm Erection		Nil												35%	40.94%
15	Platform Pier Arm Casting		Nil												27%	33.97%
16	Platform Pier Arm Erection		Nil												24%	30.79%
17	L Girder Casting		Nil												11%	15.03%
18	L Girder Erection		Nil												3%	4.67%
19	T Girder Casting		Nil												15%	20.67%
20	T Girder Erection		Nil												15%	23.77%
21	Platform Girder Casting		Nil												8%	13.31%

Stations

32 stations are being planned on Line 4. Most of them were either in the stage of planning or under early stages of construction (as of November 2018) ^[52]

2 stations are being planned on Line 4A. Connected to word Gaimukh to Kasarvadavali also connect Metro 10.

Green Line 4
#	Station Name		Status	Connections	Layout
	English	Marathi
1	Gaimukh	गायमुख	Under Construction	Line 10 (Planned)	Elevated
2	Gowniwada	गोवनीवाडा	Under Construction	None	Elevated
3	Kasarvadavali	कासारवडवली	Under Construction	None	Elevated
4	Vijay Gardens	विजय गार्डन	Under Construction	None	Elevated
5	Hiranandani Estate	हीरानंदानी एस्टेट	Under Construction	None	Elevated
6	Stretford Avenue	स्ट्रेटफर्ड ॲव्हेन्यू	Under Construction	None	Elevated
7	Manpada (Thane)	मानपाडा	Under Construction	None	Elevated
8	Kapurbawdi	कापूरबावडी	Under Construction	Line 5 (Under Construction)	Elevated
9	Majiwada	माजिवाडा	Under Construction	None	Elevated
10	Cadbury Junction	कॅडबरी जंक्शन	Under Construction	None	Elevated
11	Mahapalika Marg	महापालिका मार्ग	Under Construction	None	Elevated
12	Thane RTO	आरटीओ ठाणे	Under Construction	None	Elevated
13	Teen Haath Naka, Thane	तीन हात नाका (ठाणे)	Under Construction	None	Elevated
14	Mulund Naka	मुलुंड नाका	Under Construction	None	Elevated
15	Mulund Fire Station	मुलुंड अग्निशमन केंद्र	Under Construction	None	Elevated
16	Sonapur	सोनापूर	Under Construction	None	Elevated
17	Shangrila	शांग्रीला	Under Construction	None	Elevated
18	Bhandup	भांडुप	Under Construction	None	Elevated
19	Bhandup Mahapalika	भांडुप महापालिका	Under Construction	None	Elevated
20	Naval Housing	नौदल गृहनिर्माण	Under Construction	None	Elevated
21	Gandhi Nagar (Kanjurmarg)	गांधी नगर (कांजूरमार्ग)	Under Construction	Line 6 (Under Construction)	Elevated
22	Surya Nagar	सूर्य नगर	Under Construction	None	Elevated
23	Vikhroli	विक्रोळी	Under Construction	None	Elevated
24	Godrej Company	गोदरेज कंपनी	Under Construction	None	Elevated
25	Shreyas Cinema	श्रेयस सिनेमा	Under Construction	None	Elevated
26	Laxmi Nagar (Ghatkopar)	लक्ष्मी नगर (घाटकोपर)	Under Construction	None	Elevated
27	Pant Nagar	पंत नगर	Under Construction	None	Elevated
28	Garodia Nagar	गरोडिया नगर	Under Construction	None	Elevated
29	Amar Mahal Junction	अमर महाल जंक्शन	To be removed	None	Elevated
30	Siddharth Colony	सिध्दार्थ कॉलनी	Under Construction	Line 2 (Under Construction)	Elevated
31	Suman Nagar	सुमन नगर	To be removed	None	Elevated
32	Anik Nagar Bus Depot	अणिक नगर बस आगार	Under Construction	None	Elevated
33	Wadala Truck Terminal	वडाळा ट्रक टर्मिनल	Under Construction	None	Elevated
34	Bhakti Park (Wadala)	भक्ति पार्क (वडाळा)	Under Construction	Line 1 (Mumbai Monorail) Line 11 (Planned)	Elevated

Cost

Line 4 is estimated to cost ₹14,549 crore (US$1.8 billion), ^[53] and Line 4A is estimated to cost ₹949 crore (US$120 million). ^[18] The Maharashtra Government signed an EUR545 million (₹4,000 crore) loan agreement with German development bank KfW to fund construction of Metro 4 and 4A in November 2020. ^[54]

Infrastructure

Rolling stock

The MMRDA awarded a ₹1,854 crore (US$230 million) contract to Alstom to supply 234 metro coaches for Line 4 and 4A in March 2021. ^[55] This was Alstom's first order after acquiring Bombardier Transportation in January 2021. ^{[56] [57]} However, the company cancelled the order in March 2022 citing delays in completing the project. ^[58]

Depot

The depot for the line is located at Mogharpada in Thane. It will also serve as the depot for Line 10 and Line 11. The depot has a maximum capacity for 64 stabling lines, half of which are reserved for future use, in addition to 10 inspection bays lines and 10 workshop lines. The depot also houses the operational control centre, administrative building, maintenance and workshop building, auxiliary substation, and staff quarters. ^[48]

Pocket track

The Bhakti Park station will have a pocket track to enable trains to park off the main line. Line 4's depot at Mogharpada also serves Line 10 and Line 11 which creates the possibility of trains having to run without passengers from the depot to Chhatrapati Shivaji Terminus during morning hours. The pocket track enables trains to park off the main line without traveling to the last station on the line. ^[59]

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