East-West Metro (Kolkata)

East-West Metro (Kolkata)
Name	East-West Metro (Kolkata)
Locale	Kolkata, West Bengal
Transit type	Rapid transit
Lines	1 (Phase 1)
Stations	12 (Phase 1 operational)
Operator	Kolkata Metro Railway Corporation Limited; Metro Railway, Kolkata
Character	Underground and elevated
Depot	Kolkata Metro Depot, Dum Dum (proposed)
Annual ridership	(projected) 500,000–800,000
Website	Kolkata Metro

East-West Metro (Kolkata) is a rapid transit line in Kolkata linking the eastern and western corridors across Hooghly River via an under-river tunnel. The project connects major nodes such as Salt Lake, Sealdah, Howrah, and Esplanade while integrating with systems including Kolkata Metro Line 1, Kolkata Suburban Railway, and Netaji Subhas Chandra Bose International Airport. The line is notable for the first underwater metro tunnel in India and for crossing dense urban fabric including Victoria Memorial and Rabindra Sarobar environs.

Overview

The line was conceived to provide east–west axial connectivity between Howrah and Salt Lake, reducing travel time across congested corridors linking Howrah Maidan, BBD Bagh, Park Street, and Sector V. Planning emphasized interchanges with Park Street, Esplanade, and the Howrah Junction railway station complex, and aimed to serve employment hubs such as Technopolis Kolkata, Salt Lake Electronics Complex, and educational institutions like Presidency University and Jadavpur University. The project involved partnerships with Rail Vikas Nigam Limited, Afcons Infrastructure Limited, Larsen & Toubro, and international firms including Siemens and Sumitomo Corporation.

History and Planning

Initial proposals dated to studies by Calcutta Metropolitan Development Authority and consultancy reports influenced by precedents such as Delhi Metro and Mumbai Metro. The scheme received funding and technical advice from institutions like Japan International Cooperation Agency and negotiations with State Government of West Bengal and Ministry of Railways (India). Political milestones included approvals by Kolkata Metropolitan Development Authority and commitments after deliberations involving West Bengal Legislative Assembly representatives. Early alignment changes were driven by archaeological concerns from Archaeological Survey of India near Victoria Memorial and heritage buffers around Chowringhee Road.

Route and Stations

Phase 1 runs roughly from Salt Lake Sector V to Sealdah via an underground alignment beneath EM Bypass and central Kolkata, while extensions aim to reach Howrah Maidan and Howrah Station. Key stations include interchanges serving Esplanade, Maidan, Rabindra Sadan, and business districts near BBD Bagh. The river crossing uses an immersed or bored tunnel concept under the Hooghly River, connecting stations on the Howrah and Kolkata banks and interfacing with Howrah railway station multimodal plans. Station architecture referenced precedents like Netaji Subhash Chandra Bose International Airport terminals and incorporated accessibility standards modeled after London Underground and Tokyo Metro practices.

Construction and Engineering

Construction involved specialized tunnelling under the Hooghly River using tunnel boring machines procured after consultations with Mitsubishi Heavy Industries and contractors experienced from projects like Delhi Metro Rail Corporation contracts. Complexities included water table management near Salt Lake Stadium and heritage-sensitive piling adjacent to St. Paul’s Cathedral and Writers' Building. Elevated sections employed precast viaduct segments by firms such as Larsen & Toubro while underground cavern stations used cut-and-cover and NATM methods tested on prior projects such as Chennai Metro. Safety systems were implemented following standards from International Electrotechnical Commission and partners including Siemens for signalling and ABB for electrification.

Operations and Rolling Stock

Operations are coordinated by Metro Railway, Kolkata with support from Kolkata Metro Railway Corporation Limited; rolling stock comprises stainless-steel metro rakes procured with technology transfer agreements referencing suppliers like BEML and international consortiums. Trains run on 750 V DC third-rail / overhead configurations debated in alignment with Kolkata Metro Line 1 compatibility and signalling uses automatic train protection systems similar to Communications-based train control deployments in Singapore MRT and Hong Kong MTR. Fare integration and smartcard systems were designed to interface with ticketing used by Kolkata Suburban Railway and pilot contactless schemes modeled on Oyster card and Octopus card systems.

Impact and Controversies

The corridor is projected to alter commuting patterns between Howrah and Salt Lake and stimulate development near Sector V and BBD Bagh while raising debates involving Archaeological Survey of India over heritage impacts near Victoria Memorial and Fort William precincts. Environmental groups referencing Central Pollution Control Board guidelines questioned construction impacts on Hooghly River ecology and groundwater, echoing public interest litigious actions seen in disputes around Narmada Dam and Tehri Dam projects. Cost overruns implicated contractors like Afcons Infrastructure Limited in disputes with funding agencies including Japan International Cooperation Agency and led to inquiries by Comptroller and Auditor General of India practices. Social impacts included resettlement issues near Bowbazar and compensation negotiations comparable to controversies on Mumbai Coastal Road and Delhi-Meerut Regional Rapid Transit System.

Future Expansion and Upgrades

Planned extensions envisage full service from Howrah Station to Santragachi and further integration with Kalyani and Bardhaman suburban corridors, coordinating with proposals for Howrah Maidan redevelopment and Kolkata Circular Railway interlinks. Upgrades under consideration include signalling migration to advanced European Train Control System levels, introduction of higher-capacity rakes inspired by Mumbai Metro Yellow Line procurement, and multimodal hubs integrating Netaji Subhas Chandra Bose International Airport connectivity similar to Chhatrapati Shivaji Maharaj International Airport metro links. Funding discussions reference models used by Asian Development Bank and bilateral frameworks exemplified by Japan International Cooperation Agency projects.

Category:Kolkata Metro Category:Rapid transit in India