Bengaluru, India’s technology capital, is no stranger to traffic congestion. Long commutes and gridlocked junctions have been part of daily life for residents across the city for years. Now, in an ambitious attempt to change this growing challenge, the Karnataka government has come up with a ₹17,698 crore underground tunnel road project connecting Silk Board Junction to Hebbal-a stretch that represents one of the most congested commute corridors in Bengaluru.
The proposed tunnel will stretch 16.75 kilometres, making it one of the longest urban road tunnels in India. Designed to provide signal-free travel, the tunnel aims to bypass around 25 key traffic junctions, drastically cutting in travel time between the city’s southern and northern hubs. For those working in major IT clusters along the Outer Ring Road (ORR), Electronics City, and the Airport road corridor, this project is being hailed as a possible breakthrough solution.
A City Choking on Its Roads
In Bengaluru today, there are over 1.2 crore vehicles, which see a significant addition every year. The rapid expansion of Metro lines, bus fleets, and flyovers has not been able to match up with the increasing density of vehicles on the road. The stretch between Silk Board, Dairy Circle, Mekhri Circle, RT Nagar, and Hebbal is particularly notorious; it takes more than 90 minutes during peak hours for commuters to cross.
The underpass will reduce this travel time to 25–30 minutes and provide a driving experience with a continuous flow. Officials argue that without large-scale structural intervention, Bengaluru risks reaching a point where its economic productivity could be hindered by daily traffic collapse.
The Vision: Multi-Layered Urban Mobility
It is being promoted by the Government as part of a multi-layered urban mobility strategy in which Metro and suburban rail, bus rapid transit, elevated corridors, and underground travel corridors will coexist. The tunnel is expected to feature multiple entry and exit points, ventilation systems, emergency lanes, and lighting designed to meet international standards.
Advocates believe this infrastructure will reduce fuel consumption and, in turn, reduce emissions because travel times will be shorter, resulting in fewer stoppages. Theoretically, that would make Bengaluru a cleaner, more efficient city.
Criticism: “Are We Encouraging More Cars?”
Yet despite the promise, it has been a lightning rod for criticism among urban planners, environmental experts, and civic groups. The most prevalent concern is based on a timeless precept of traffic: induced demand. When new road capacity is created, it initially eases traffic — but soon encourages more cars on the road, bringing congestion back to previous levels or worse.
Experts, on the other hand, feel that it will actually serve private vehicle owners rather than public transport users. The bus fleet of Bengaluru, though big, is already struggling with a lack of dedicated lanes and unpredictable traffic speeds. Some critics say that an investment of ₹17,698 crore in expanding Metro lines, suburban rail, walkability, and cycling infrastructure would yield more equitable and sustainable outcomes.
Environmental and Execution Challenges
Construction of such a big underground structure in Bengaluru also poses geological challenges. Engineers will be faced with managing different rock density, layers of groundwater, and an urban utility network comprising sewage pipes, fiber-optic cables, and water supply lines. In some places, entry and exit points also need acquisition of land, which may displace residents and commercial establishments.
There is the concern of cost escalation, as usually happens with India’s infrastructure megaprojects. In case of delays, the final cost will substantially increase beyond the initial estimate.
Political Reactions and Public Sentiment
Public reaction is divided. While some commuters welcome any solution that promises to relieve daily stress, others feel the project promotes car-led mobility in a city in dire need of strong and more affordable public transport systems.
Several political leaders and mobility activists have urged the government to grant priority to Metro expansion and fare rationalisation, especially in the face of recent public criticism over metro ticket hikes.
The Road Ahead
The project is currently in the DPR and feasibility evaluation stage. Even with fast approvals, construction may take 6 to 8 years. Meanwhile, there is a possibility of some discomfort or disruptions in the surrounding areas, adding to the congestion for the time being.
Conclusion
The tunnel road project stands at an interesting juncture between bold vision and cautionary concern. If the project is thoughtfully integrated into the broader transport network, then it could reshape the way Bengaluru moves. If pursued in isolation, it will join the growing list of big-ticket projects that merely redistribute the city’s traffic burden rather than resolve it.
The coming months — filled with technical planning, public consultations, and funding decisions — will determine whether this tunnel becomes a transformative mobility landmark or a high-cost gamble with uncertain returns.
