Mumbai-Ahmedabad Bullet Train Project Achieves Major Milestone as Third Mountain Tunnel Breakthrough Completed in Palghar
The Mumbai-Ahmedabad Bullet Train Project has reached a major milestone with the successful breakthrough of the MT-07 mountain tunnel in Palghar district. The achievement marks the completion of three mountain tunnels between Vapi and Boisar, advancing India’s first high-speed rail corridor that will reduce travel time between Mumbai and Ahmedabad to under two hours.
According to NHSRCL, the MT-07 tunnel measures 417 metres in length and 14.4 metres in width. The tunnel has been specifically designed to accommodate both the up and down railway lines of the high-speed rail corridor. Project officials stated that the achievement reflects the rapid progress being made in one of the most geographically challenging sections of the Mumbai-Ahmedabad High-Speed Rail Corridor.
The tunnel was excavated through difficult mountainous terrain using controlled drilling and blasting techniques. Engineers carried out excavation simultaneously from both ends of the tunnel, enabling the construction work to be completed within the planned timeline. Advanced monitoring systems and geotechnical instruments were deployed throughout the construction process to ensure safety and structural stability.
Real-time monitoring technologies were also installed at the project site. These included Surface Settlement Points (SSP), 3D targets, strain gauges and seismographs, which continuously tracked ground movement, vibrations and tunnel behaviour. The monitoring systems helped ensure the safety of nearby structures. In addition, modern ventilation systems, fire safety measures and controlled access arrangements were implemented to protect workers during construction.
NHSRCL stated that with the completion of MT-07, excavation work for all three mountain tunnels located between Vapi in Gujarat and Boisar in Maharashtra—MT-08, MT-07 and MT-06—has now been completed. This section passes through a key industrial belt, making the timely completion of these tunnels critical to the overall progress of the project.
The Mumbai-Ahmedabad Bullet Train Project includes the construction of eight mountain tunnels. Seven of these tunnels are being built in Palghar district of Maharashtra, while one tunnel is being constructed in Valsad district of Gujarat. Earlier, construction of another tunnel near Safale village in Palghar was completed in February 2026, while the breakthrough of the MT-05 tunnel was achieved in January 2026.
The 508-kilometre Mumbai-Ahmedabad High-Speed Rail Project is India’s first and currently only bullet train project. The corridor will pass through Gujarat, Maharashtra and Dadra and Nagar Haveli. The project is being developed with technical and financial assistance from Japan. The bullet train will operate at a maximum speed of 320 kilometres per hour.
Upon completion, travel time between Mumbai and Ahmedabad will be reduced to just 1 hour and 58 minutes. The corridor will connect major cities including Sabarmati, Ahmedabad, Anand, Vadodara, Bharuch, Surat, Bilimora, Vapi, Boisar, Virar, Thane and Mumbai.
Experts believe the project will provide a major boost to industrial and economic development across western India while significantly transforming regional connectivity. The completion of the MT-07 tunnel represents another crucial step toward the realization of the country’s landmark high-speed rail network.

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