What’s Happening
India’s first high-speed bullet train project has reached a significant engineering milestone. The final breakthrough of a 1.5-kilometer mountain tunnel in Palghar district, Maharashtra was achieved as part of the Mumbai–Ahmedabad Bullet Train Corridor. Railway officials say this step brings the country closer to completing the ambitious high-speed rail route.
Who Witnessed It
Railway Minister Ashwini Vaishnaw virtually witnessed the moment from Rail Bhawan in New Delhi, using a live video link to connect with the site in western India. His presence underscores the importance of this development in the national infrastructure roadmap.
Where It Took Place
The milestone came in Palghar district of Maharashtra, between the upcoming Virar and Boisar bullet train stations. This tunnel — referred to as Mountain Tunnel-5 (MT-5) — is among the longest mountain tunnel sections to be completed in the state.
When It Happened
The breakthrough was announced on January 2, 2026, and was formally observed by the Railway Minister from the capital on January 3, 2026. It marks one of several critical construction achievements in the high-speed rail corridor so far.
Why This Matters
The Mumbai–Ahmedabad Bullet Train Corridor is India’s most ambitious high-speed rail project, being built with technical and financial support from Japan. The 508-kilometre route will eventually feature modern bullet trains running up to 320 km/h, dramatically cutting travel times between major commercial cities.
This latest tunnel breakthrough:
- Confirms progress in challenging mountainous terrain
- Opens the way for quicker track-laying and systems installation
- Proves the engineering teams can tackle difficult geology
Officials noted this is the second major tunnel breakthrough in Maharashtra, following an earlier 5-km underground tunnel near Thane and BKC, completed in September 2025.
How It Was Built
The MT-5 tunnel was excavated from both ends using modern drill-and-blast techniques, which allow engineers to monitor ground conditions closely and ensure safety during construction. This method also helps in stabilizing the tunnel lining as it progresses through hard rock sections.
Indian Railways officials highlight that such techniques are essential for meeting quality and safety standards, even in the most demanding terrain.
What Officials Are Saying
Railway Minister Ashwini Vaishnaw described the breakthrough as a “big milestone” for the project, emphasizing how key engineering achievements like this bring India closer to a future of high-speed rail travel. Telangana Today
The corridor will connect major cities including Mumbai, Surat, Vadodara, Ahmedabad, and beyond, fostering economic growth and faster connectivity across western India.
Highlights – Quick Facts
- Tunnel Breakthrough: 1.5 km mountain tunnel breakthrough achieved.
- Location: Palghar district, between Virar and Boisar stations.
- Date Witnessed: Early January 2026, virtually observed by Rail Minister.
- Project: Mumbai–Ahmedabad Bullet Train Corridor.
- Support: Executed with Japanese technical assistance.
Railway Minister Ashwini Vaishnaw virtually witnessed the breakthrough of a 1.5-km-long mountain tunnel at Palghar, Maharashtra for the Mumbai Ahmedabad Bullet Train Corridor project. This tunnel one of the longest mountain sections in the high-speed rail project connects the Virar and Boisar stations and marks a major construction milestone. The corridor, supported by Japan, is designed for bullet trains running at up to 320 km/h.
