Thane to Borivali: India’s Longest and Largest Urban Tunnel

On July 13, 2024, Prime Minister Narendra Modi inaugurated India’s longest and largest urban tunnel project, the Thane Borivali Twin Tunnel, developed by the Mumbai Metropolitan Region Development Authority (MMRDA). This Rs. 16,600 crore project will reduce travel time between Thane and Borivali from over an hour to just 12 minutes, cutting the travel distance by 12 km. This initiative is part of broader infrastructure projects worth Rs. 29,000 crore aimed at enhancing connectivity in Mumbai.

Key Highlights of the Thane Borivali Twin Tunnel

• Tunnel Length: 11.8 km
• Route: From Thane to National Highway 8 at Borivali
• Estimated Cost: Rs. 16,600 crore
• Operational Lanes: 2 operational lanes, 1 emergency lane
• Travel Time Reduction: More than 1 hour saved (journey completed in 12 minutes)
• Carbon Emissions Reduction: 1,50,000 MT per year
• Completion Target: May 2028

Environmental and Technical Aspects

The tunnel, which includes a 10.25 km bored section with cross passages every 300 meters, will use India’s largest tunnel-boring machine. MMRDA assures that its construction will not harm the Sanjay Gandhi National Park and will help reduce noise and air pollution.

Strategic Implications and Benefits

• Traffic Alleviation: Eases traffic on Ghodbundar Road and the Western Express Highway.
• Enhanced Connectivity: Improves east-west suburban connectivity with a direct and efficient route.
• Environmental Impact: Expected to reduce annual carbon emissions by 1,50,000 MT.

About Mumbai Metropolitan Region Development Authority (MMRDA)

Established in 1975, MMRDA is responsible for planning and overseeing development in the Mumbai Metropolitan Region. It initiated the development of the Bandra-Kurla complex and the Mumbai Metro, among other significant infrastructure projects, including the Mumbai Urban Infrastructure Project and the Mumbai Trans-Harbour Link.

Inauguration by PM Modi

During the launch, PM Modi highlighted the tunnel’s role in enhancing connectivity in Mumbai, complementing other significant projects like the Coastal Road and Atal Setu. This tunnel is expected to be a game-changer for commuters, significantly improving travel efficiency and environmental conditions in the region.