Bengaluru’s Hebbal short-tunnel project is facing renewed scrutiny from citizens concerned about its environmental footprint, cost and long-term traffic benefits. The proposed underground road between Hebbal and the University of Agricultural Sciences area is already moving towards implementation, but the objections highlight a broader question for the city: whether adding road capacity remains the most effective way to manage congestion in a rapidly urbanising northern corridor.
The proposed tunnel is around 2.2 km long and is designed as a six-lane facility, with three lanes in each direction. It forms part of a wider traffic-management plan linking the Hebbal area with Mehkri Circle and is intended to move through-traffic away from congested surface junctions. The project was approved with a broader infrastructure package and has subsequently progressed through tendering and construction preparations. Citizen concerns have centred particularly on the ecological consequences of construction through the green landscape associated with the University of Agricultural Sciences and surrounding areas. Online community discussions have raised claims that more than 1,000 trees could be affected, although such figures should be independently established through official tree inventories and environmental assessments before being treated as confirmed. The environmental question matters because the corridor sits within one of Bengaluru’s remaining substantial green areas. Trees and open land perform functions that conventional road infrastructure cannot easily replace, including reducing surface heat, absorbing stormwater and supporting urban biodiversity.
Any loss therefore needs to be assessed against both the transport gains and the city’s growing climate-resilience requirements. Cost and network efficiency are another concern. Earlier government planning put the combined tunnel-and-corridor package at a significantly higher figure, while subsequent tendering has produced a lower quoted cost for the tunnel component. The project is also being developed alongside other road interventions around Hebbal and Mehkri Circle, raising the possibility that traffic could be redistributed between successive junctions rather than permanently removed from the network. That issue is particularly relevant because the same northern Bengaluru corridor is expected to interact with future mass-transit infrastructure. The proposed Hebbal–Sarjapur Metro corridor would introduce a high-capacity public transport connection across the city, making coordination between road investments and mass transit important for avoiding conflicting infrastructure priorities. For planners, the immediate requirement is not simply to choose between a tunnel and no tunnel.
A transparent assessment should measure expected travel-time savings, induced traffic, tree loss, stormwater impacts, construction disruption and compatibility with future public transport. Bengaluru’s mobility challenge ultimately extends beyond moving vehicles faster. Infrastructure decisions around Hebbal will shape how the city balances accessibility, ecological protection and public spending as northern Bengaluru continues to grow.
