DMRC Celebrates Remarkable Breakthrough in Tunnelling Work on Phase 4 Golden Line

In a significant boost to Delhi’s transport infrastructure, the Delhi Metro Rail Corporation (DMRC) has achieved a remarkable tunnelling breakthrough on the Phase 4 Golden Line. The milestone marks a crucial step in enhancing the capital city’s urban mobility network, with engineers successfully completing a key tunnel section near Krishna Park Extension.

This tunnelling success is part of the 7.96 km-long corridor that will connect Janakpuri West to RK Ashram Marg, forming a pivotal stretch under Delhi Metro’s Phase 4 Golden Line. The new development is being hailed as a momentous achievement in the timeline of one of the world’s most extensive metro systems.

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Phase 4 Golden Line: The Backbone of New Connectivity

The Phase 4 Golden Line is part of DMRC’s ambitious expansion strategy. This line, once operational, is expected to decongest existing routes, offer faster east-west connectivity, and facilitate smoother transitions across the city’s major interchange stations.

The recently completed tunnel, built using the Tunnel Boring Machine (TBM), spans 1.4 km from Krishna Park Extension to Keshopur. This breakthrough is especially notable as it was achieved under dense residential areas with minimal surface disruption, highlighting the technological precision and careful planning by DMRC.

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Tunnelling Under Pressure: Engineering Triumph

The TBM, named “Trisha”, has been instrumental in making this underground tunnelling a success. The boring process began in January 2024, navigating through complex soil conditions and urban obstacles. After months of round-the-clock operations, engineers celebrated as “Trisha” surfaced successfully—paving the way for track laying and station construction.

DMRC officials revealed that the entire tunnel has a circular diameter of 5.8 meters, and the work was done using the Earth Pressure Balance Method, ensuring minimal environmental impact.

This major tunnelling success sets the tone for accelerated progress across the Phase 4 Golden Line corridor, which features several underground and elevated stretches across its length.

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A Game Changer for Commuters

Once operational, the Phase 4 Golden Line will transform commuting patterns in the city. With stations like Majlis Park, Azadpur, Shalimar Bagh, Ashok Vihar, and RK Ashram, the line will cater to thousands of daily passengers, offering a reliable and time-saving alternative to road travel.

This development also promises to ease pressure on the Blue Line and Pink Line, redistributing passenger traffic more efficiently and reducing peak-hour congestion.

According to DMRC, the corridor is likely to be completed and opened to the public by late 2026, with civil works moving at a commendable pace following this tunnelling success.

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Environmental and Urban Planning Benefits

The Phase 4 Golden Line is more than just a metro corridor—it represents a shift towards sustainable and eco-friendly public transport. With Delhi struggling with air pollution and traffic chaos, expanding metro connectivity is a vital step towards a greener and more livable city.

This breakthrough also highlights DMRC’s continued adherence to modern urban planning, where infrastructure grows with minimal disruption to the environment and surrounding communities.

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What’s Next for the Phase 4 Golden Line?

With this tunnelling milestone achieved, DMRC will now focus on completing the next leg of the tunnel and initiate works for station interiors, track installations, and system integrations.

The completion of tunnelling from Krishna Park Extension brings the total number of successful TBM breakthroughs in the Phase 4 Golden Line project to five, a positive sign that the entire corridor is progressing on schedule.

Officials have stated that future tunnelling on other stretches is ongoing, with safety, speed, and sustainability remaining top priorities.

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Public Reaction and Political Voices

Public sentiment has been largely positive, with residents of west and central Delhi expressing hope that the Phase 4 Golden Line will drastically cut travel time. Local leaders and urban policy advocates have praised DMRC’s milestone, calling it a model for other Indian cities aiming to improve urban transit.

Delhi government officials reiterated their commitment to enhancing public transportation and congratulated DMRC’s engineers and workers for this “engineering marvel.”

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Conclusion: The Golden Line Glows Brighter

The successful tunnelling breakthrough on the Phase 4 Golden Line marks not just an infrastructural achievement, but also a beacon of urban progress. With every metre laid underground, Delhi moves closer to becoming a world-class smart city with robust, eco-friendly mobility solutions.

As the capital continues to grow, so does its need for smarter transit options—and the Phase 4 Golden Line is poised to deliver just that.