Mumbai’s Longest 5 Km Tunnel Under SGNP to Transform Connectivity

By Ajjay Bhagyakar | Published by Griha Realty

Source: Magicbricks

Source: Magicbricks

Mumbai is set to witness a major infrastructure breakthrough with the construction of its longest 5 km twin tunnel beneath Sanjay Gandhi National Park (SGNP). The ambitious project is expected to begin soon, marking a new chapter in the city’s urban mobility.

A Game-Changing Infrastructure Project

The tunnel is part of the larger Thane–Borivali connectivity corridor, designed to ease congestion and improve travel efficiency across Mumbai’s suburbs. The total project spans around 11.8 km, with a significant portion running underground through SGNP.

Built using advanced Tunnel Boring Machines (TBMs), the project reflects modern engineering standards while ensuring minimal environmental disruption, Mumbai’s Longest 5 Km Tunnel Under SGNP to Transform Connectivity.

Travel Time Slashed to 15 Minutes

One of the biggest highlights of this project is the drastic reduction in travel time. Currently, commuters take 60–90 minutes to travel between Thane and Borivali. Once completed, the tunnel will cut this journey down to just 15 minutes, offering massive relief from daily traffic congestion.

Cost and Key Features ( Mumbai’s Longest 5 Km Tunnel Under SGNP to Transform Connectivity )

• Estimated project cost: ₹14,000–15,700 crore 

• Twin tunnels with multiple lanes and emergency provisions

• Cross-passages every few hundred meters for safety

• Advanced ventilation, fire safety, and monitoring systems

Boost to Real Estate & Connectivity

This mega project will directly connect the Western Express Highway with Thane, improving access across key residential zones. It is expected to significantly boost real estate demand in areas like Borivali, Thane, and surrounding suburbs due to improved connectivity.

A Step Towards Future Mumbai

With work expected to begin soon, this tunnel project is a bold move toward solving Mumbai’s traffic challenges. By combining speed, sustainability, and smart infrastructure, it reinforces the city’s vision of becoming a globally competitive urban hub.