Larsen & Toubro (L&T), India's leading infrastructure and engineering conglomerate, has clinched a significant contract in the prestigious Mumbai-Ahmedabad High Speed Rail (MAHSR) project, commonly known as the bullet train project. The company will be responsible for constructing 156 kilometers of high-speed track, marking a substantial milestone in India's ambitious transportation infrastructure development.

Contract Details

L&T's Transportation Infrastructure business vertical has been awarded this large order by the National High Speed Rail Corporation Ltd (NHSRCL). The scope of work includes:

• Design, supply, construction, testing, and commissioning of track-works
• 156 Route Km (RKM) of high-speed ballastless track (Package T1)
• Over 21 km of track-works in underground sections
• 135 km of track on elevated viaduct sections

The project will span from Mumbai (Bandra-Kurla complex) to Zaroli village in Gujarat, covering a significant portion of the MAHSR corridor.

Technological Advancements

The project will utilize Japanese Shinkansen J Slab Track Technology, which offers several advantages:

• Enables speeds up to 320 kmph
• Improved ride quality
• Increased service life
• Enhanced maintainability

L&T's Growing Role in MAHSR

This contract represents a substantial expansion of L&T's involvement in the bullet train project:

• Second track-work package won by L&T in MAHSR
• Previously awarded Package T3 (116 km) from south of Vadodara city to Sabarmati depot in April 2022
• L&T now responsible for over 50% of the total track-works in MAHSR

Company's Expertise

L&T has positioned itself as India's leading player in ballastless track technology, with expertise across various track systems including:

• Plinth Track
• Slab Track
• Low Vibration Track
• Floating Slab Track
• Pre-cast Slab Track

The company is currently executing ballastless track projects in multiple metros in India and abroad, including Bengaluru, Chennai, Mumbai, and Jakarta.

Management Commentary

Mr. S V Desai, Whole-time Director & Sr EVP (Civil Infrastructure) at L&T, commented on the order win: "Our success in T3 package involved rapid technology absorption, indigenisation of plant & machinery and value engineering. This has been a key factor in our approach to this new order, and we are confident of delivering on time".

This latest contract further solidifies L&T's position as a key player in India's infrastructure development, particularly in the high-speed rail sector. The Mumbai-Ahmedabad bullet train project continues to make progress, promising to revolutionize intercity travel and boost economic growth in the region.

Larsen & Toubro (L&T), a leading Indian multinational conglomerate, has achieved a significant milestone in the construction of India's longest rail tunnel. The 14.57 km stretch between Devprayag and Janasu in Uttarakhand has been completed ahead of schedule, marking a major advancement in the country's infrastructure development.

Project Details

The tunnel is a crucial component of the 125-km Rishikesh-Karnaprayag Rail Link Project, which is being executed by Rail Vikas Nigam Limited. This ambitious project is targeted for commissioning by December 2026, with the recent tunnel completion representing a significant step towards meeting this deadline.

Technical Achievements

Two tunnel boring machine operators from L&T demonstrated exceptional skill and perseverance in completing this challenging project. They overcame extreme conditions, including a massive landslide that blocked the machine 3.5 km inside the mountain, showcasing L&T's technical expertise and problem-solving capabilities.

Timely Completion

The project has seen impressive progress:

• The upline tunnel, measuring 14.57 km, was completed on April 16, 2025, an impressive 12 days ahead of schedule.
• A parallel 13.09 km downline tunnel achieved breakthrough on June 29, 2025.

Project Scope and Technology

The Rishikesh-Karnaprayag Rail Link Project involves approximately 30 km of total tunnelling work. The construction methodology breakdown is as follows:

This project marks a significant milestone as it represents the first deployment of tunnel boring machines for a railway project in the Himalayas, highlighting L&T's role in introducing advanced construction technologies to challenging terrains.

Implications for Infrastructure Development

The completion of this tunnel ahead of schedule not only demonstrates L&T's efficiency and technical prowess but also contributes significantly to India's infrastructure development, particularly in the strategically important and geographically challenging Himalayan region. This achievement is expected to boost connectivity and economic development in Uttarakhand and surrounding areas.

As the project progresses towards its 2026 completion target, it stands as a testament to India's growing capabilities in executing complex infrastructure projects in difficult terrains, with L&T at the forefront of this technological and engineering advancement.