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The centerpiece of the project is a 13.153 km long single-tube, two-lane tunnel running beneath the Zojila Pass between Baltal in Kashmir and Meenamarg towards Ladakh.
Union Minister Nitin Gadkari on June 9 blasted the strategic Zojila tunnel connecting Jammu and Kashmir with Ladakh.
On June 9, engineers achieved the final breakthrough of the Zojila Tunnel, which is set to become India’s longest road tunnel and the world’s longest bi-directional road tunnel at such an altitude. The final blast of the tunnel may appear to be another infrastructure milestone, but it actually marks the culmination of one of the most strategically important engineering projects undertaken in independent India.
For tourists, the tunnel will mean faster and safer travel to Ladakh. For the Indian Army, this could fundamentally change the way it guards one of the country’s most sensitive borders.
Zojila Pass is located at an altitude of about 11,500 feet above sea level on the Srinagar-Leh Highway. It is the gateway between Kashmir Valley and Ladakh. Every winter, heavy snowfall, blizzards, avalanches and landslides close the pass for months, cutting Ladakh off from the rest of India. For civilians, this means delayed supplies, disrupted transportation and isolation.
For the Army, this poses a far more serious challenge.
Ladakh hosts some of India’s most sensitive military deployments, facing both Pakistan and China. Every winter closure complicates the movement of troops, equipment, fuel, ammunition and heavy military platforms. This is why defense planners have long viewed Zojila not as just a road project but as a strategic necessity.
What is Zojila Tunnel: Features
The centerpiece of the project is the 13.153 km long single-tube, two-lane tunnel passing beneath the Zojila Pass between Baltal in Kashmir and Meenamarg on the Ladakh side. The tunnel is situated at an altitude of approximately 11,578 feet.
But the tunnel itself is only one part of the project. The entire package comprises a 13.15 km long main tunnel, four bridges with a combined length of approximately 910 m, additional Nilgiri tunnels, eight cut-and-cover tunnel sections spanning approximately 2.35 km and three massive ventilation shafts reaching depths of approximately 480 m, 385 m and 213.5 m.
The tunnel is designed as a horseshoe-shaped structure approximately 7.57 meters high and is capable of supporting two-way traffic throughout the year.
Project cost estimates have evolved over time as designs changed and inflation increased. As per current estimates the cost is more than Rs 4,600 crore.
This idea is older than many people realize. Government discussions about an all-season route through Zojila began in the mid-2000s. The project received approval years later, with the foundation stone laid in 2018. However, progress was delayed due to financial problems of the original contractor and the redesign. The contract was eventually re-awarded to Megha Engineering and Infrastructure Limited (MEIL) in 2020. Major construction began in 2021.
The delays reflect the reality of Himalayan infrastructure: tunneling is difficult; Making it under Zozilla is another challenge altogether.
Excavation of one of the world’s most difficult mountain ranges
Geologically the Himalayas are young mountains. It seems harmless until engineers start drilling into them. Young mountains are unstable. Rocks break easily. Water leaks unexpectedly. Underground pressure changes continuously. Entire sections may become unstable without warning.
Engineers had to deal with delicate geology, water ingress, avalanche-prone terrain, extreme cold, seismic Zone IV conditions, and high-altitude health risks for workers.
Temperatures often drop to minus 18 degrees Celsius in winter, while work can be disrupted for weeks due to snow accumulation and avalanches. Unlike urban tunnels, workers here were working in thin air with significantly lower oxygen levels.
Even routine tasks become difficult.
Machinery loses its efficiency. Curing concrete becomes more complex. Man’s stamina reduces.
Every meter of excavation requires extraordinary planning.
The engineering method that made it possible
The tunnel was excavated using the New Austrian Tunneling Method (NATM), a widely used technique for difficult mountain tunneling. Instead of aggressively applying pressure to the rock, NATM works with the mountain itself.
Engineers excavate small sections, continuously monitor geological conditions and quickly reinforce exposed surfaces using shotcrete, rock bolts, steel supports and continuous geotechnical monitoring. This approach allows adjustments to be made as rock conditions change.
In the Himalayas, where conditions can vary dramatically within a few metres, flexibility is essential.
the people behind the tunnel
About 1,200 engineers, mechanics, technicians and laborers are working on this project. They operated simultaneously from both ends of the tunnel – Baltal in Kashmir and Meenamarg in Ladakh.
Construction teams worked year-round, despite blizzards, sub-zero temperatures, risks of high altitude sickness, avalanche dangers, and geological uncertainties. The success achieved in June 2026 was not solely the result of drilling. This required years of surveying, blasting, stabilization, ventilation planning and safety engineering.
Why does the tunnel matter more to the military than to tourists?
Tourism headlines often focus on short travel times.
The army sees something else. The tunnel addresses one of India’s most significant logistical weaknesses.
Currently, closure of Zojila Pass may severely impact movement between Kashmir and Ladakh during winter. Once operational, the tunnel will ensure year-round connectivity regardless of the weather.
That means:
- rapid deployment of army
- Reliable movement of military convoys
- Better supply of fuel and ammunition
- greater operational flexibility
- Dependence on weather reduced during crisis
Its strategic importance becomes clear when we look at history.
During the 1999 Kargil conflict, Pakistan tried to threaten and disrupt the Srinagar-Leh axis as it represented the lifeline connecting Ladakh to the rest of India. Any blockage in this corridor has a direct impact on military logistics.
The Zojila Tunnel effectively provides all-weather protection to that vital artery.
economic dividend
Although defense may be the primary beneficiary, the civilian benefits are substantial. Today, in favorable conditions it can take up to three hours to cross the Zojila section. With the tunnel, that trip is expected to take only 20 to 30 minutes.
This leads to lower fuel consumption, reduced transportation costs, faster movement of goods, better access to health care, better emergency response, stronger tourism flows and reduction in Ladakh’s seasonal isolation. For residents of Ladakh, the biggest benefit may simply be certainty – knowing that winter no longer means months of isolation.
The Zojila Tunnel represents the broader transformation underway on India’s northern borders. For decades, rigid geography served as a strategic disadvantage. Roads were closed. The passes became inaccessible. Military logistics depended heavily on the weather.
Projects like Zozilla are changing that equation. When the tunnel opens, tourists will see a shorter journey and safer travel.
Military planners will see something bigger: a permanent all-weather corridor linking Kashmir and Ladakh, drilled through one of the most hostile mountainous environments on Earth.
So the real importance of Zojila is not that it is the longest road tunnel in India. This is how India has finally found a way to make one of its most important strategic routes winter independent.
About the author
Pragati is news editor at news18.com. After heading the Business and Viral sections, Pragati now conceptualises, writes and edits long-form features and articles on national and global affairs. She makes sure…read more
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