SF Prep Notes

Bullet train project opens first section of 21 km undersea tunnel in Maharashtra

On 14 July 2025, the Ministry of Railways said the first section of the 21 km undersea tunnel of the Mumbai–Ahmedabad bullet train had opened between Ghansoli and Shilphata in Maharashtra.

Summary

The Mumbai–Ahmedabad High-Speed Rail (MAHSR) project opened the first section of its 21 km undersea tunnel between BKC and Thane, between Ghansoli and Shilphata in Maharashtra, the Ministry of Railways said in New Delhi on 14 July 2025. The Japanese government agreed to introduce next-generation E10 Shinkansen trains on the project, to be introduced simultaneously in India and Japan, and the entire 508 km corridor is being built with Shinkansen technology. As per the ministry, 310 km of viaduct has been constructed, 15 river bridges are complete, and 5 of the 12 stations are complete. The BKC station will be 32.5 m below ground.

Key facts

Undersea tunnel
21 km, between BKC and Thane; first section opened between Ghansoli and Shilphata
Rolling stock
E10 Shinkansen, to debut simultaneously in India and Japan
Corridor length
508 km, Japanese Shinkansen technology
Viaduct
310 km constructed
River bridges
15 completed, 4 in advanced stages
Stations
5 of 12 completed
BKC station
32.5 m below ground

Practice MCQs 3 questions

Q1

The first section of the bullet train's 21 km undersea tunnel, announced on 14 July 2025, opened between which two places?

Show answer

Correct answer: C — Ghansoli and Shilphata

Ministry of Railways: first section of 21 km undersea tunnel of the bullet train project opens between Ghansoli and Shilphata in Maharashtra.

Q2 Advanced

Which generation of Shinkansen trains has Japan agreed to introduce on the Mumbai–Ahmedabad bullet train project, simultaneously with Japan?

Show answer

Correct answer: A — E10

Ministry of Railways: Japan currently runs E5 trains; the next generation is E10, which will be introduced simultaneously in India and Japan.

Q3 Advanced

As per the Ministry of Railways update of 14 July 2025, how many of the 12 stations of the Mumbai–Ahmedabad bullet train corridor are completed?

Show answer

Correct answer: D — 5

Ministry of Railways: out of 12 stations, 5 are completed and 3 more are reaching completion stage.

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