In a potential game-changer for Mumbai’s suburban railway system, the Central Railway (CR) is exploring the possibility of constructing the city’s first underground suburban rail corridor. This ambitious plan is part of Phase 2 of the fifth and sixth line expansion project, connecting Parel or Currey Road to Chhatrapati Shivaji Maharaj Terminus (CSMT) over 7.4 km.
Inspired by the ongoing Mumbai Metro Line 3 — the city’s first underground metro — CR officials believe an underground route could help circumvent major challenges such as land acquisition and the displacement of project-affected persons (PAPs). Tunnelling 20–25 metres beneath existing tracks would allow the project to bypass congested roads, buildings, and intricate underground utilities that typically delay infrastructure works.
“We are still evaluating the feasibility of an underground section between Parel and CSMT. A detailed study will help us understand the technical and financial aspects,” a senior CR official said. The railway is currently draughting terms of reference and plans to appoint a consultant shortly.
Preliminary talks between CR and Mumbai Rail Vikas Corporation (MRVC) have been held, but execution details are yet to be finalised. The feasibility study will also determine suitable tunnel boring machine (TBM) entry and exit points, especially at the crowded Parel and CSMT stations. Options near P D’Mello Road and within the station complex are under review, though both must accommodate Metro Line 3 and the proposed Metro Line 11.
If approved, the underground segment would raise the total project cost to nearly Rs 3,000 crore — almost triple the original 2008 estimate of Rs 890.89 crore. Despite the cost hike, the plan marks a bold step toward modernising Mumbai’s rail network, ensuring faster execution and minimal commuter disruption.
Source: Daijiworld
