Bullet Train Tunnel, 310 km Viaduct Now Complete

15 Jul 2025 CW Team

The Mumbai–Ahmedabad bullet train project has reached a key milestone with the opening of the first section of a 21-kilometre undersea tunnel between BKC and Thane. The project, which forms part of India’s first high-speed rail corridor, has also completed 310 kilometres of viaduct construction.

Work is advancing rapidly on multiple fronts, including track laying, installation of overhead electrification systems, bridge construction, and station development. Construction activities in Maharashtra have also gained significant momentum. Meanwhile, procurement of operational and control systems is progressing smoothly.

Japanese Partnership and Technology:

As part of the strategic partnership between India and Japan, the entire 508-kilometre corridor is being developed using Japanese Shinkansen technology. The project will feature E10 Shinkansen trains — Japan’s next-generation high-speed trains — which will be introduced simultaneously in both India and Japan. Currently, Japan operates the E5 series.

The adoption of E10 trains reflects the deep technological cooperation between the two nations and is expected to set new benchmarks in speed, safety, and reliability.

Progress Highlights:

Viaduct: 310 km completed
River Bridges: 15 completed, 4 nearing completion
Stations: 5 fully built, 3 nearing completion
Engineering Marvel: The BKC station, located 32.5 metres underground, is designed to support a 95-metre-high building above it

Future Expansion:

The Mumbai–Ahmedabad High-Speed Rail (MAHSR) project, with an estimated cost of Rs 1.08 trillion, is paving the way for future bullet train corridors across India. The project showcases India’s growing capability to deliver world-class infrastructure powered by advanced global technology, with Japan playing a crucial role as a trusted partner.

This transformative development highlights not just engineering excellence but also the potential for high-speed rail to redefine travel and connectivity across India.

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