Travelling from Hebbal to Kempegowda International Airport (KIA) can involve delays at Sadahalli Junction, the last traffic signal on the main carriageway of Ballari Road. To address this bottleneck, the National Highways Authority of India (NHAI) is preparing to construct a 750 metre, six lane underpass at the junction. The project, estimated to cost ₹35 crore, is expected to improve traffic movement towards the airport once completed, although motorists will need to navigate diversions during construction.
The new underpass is intended to remove the remaining signal-controlled intersection on the 22 km main road stretch between Hebbal and Sadahalli. With more than 1.1 lakh vehicles reportedly passing through the nearby Sadahalli toll plaza daily, the junction is an important point for managing airport bound traffic.
Key details of the project include:
Once operational, the underpass could reduce signal related waiting times and make journeys to the airport more predictable. However, traffic conditions around Sadahalli may remain challenging while construction is underway.
The Sadahalli Junction improvement has a long history of planning changes. An overpass was proposed around a decade ago, but the plan did not proceed. NHAI later pursued an underpass project in 2019, which was shelved because of several issues, including design related concerns.
The current project represents another attempt to resolve the bottleneck. Its phased construction approach is intended to balance the need for excavation with the heavy traffic using Ballari Road. For travellers, the immediate priority will be following diversions and allowing additional time for journeys through the junction while work progresses.
The Sadahalli project is part of wider road works affecting important routes in Bengaluru.
These developments affect different parts of Bengaluru's road network, from airport access to daily commuting within the city.
The Sadahalli underpass could eventually remove a major stopping point on the drive from Hebbal to the airport. Until the work is finished, travellers should account for possible diversions and changing traffic arrangements. The benefits will depend on construction progress and how effectively traffic is managed throughout the project.
1. Where is the new Sadahalli underpass being constructed?
The underpass is planned at Sadahalli Junction on Ballari Road, on the main route connecting Hebbal with Kempegowda International Airport.
2. How long will the Sadahalli underpass be?
The planned underpass will measure 750 metres and have six lanes to accommodate traffic passing through the junction.
3. What is the cost of the Sadahalli underpass project?
NHAI has awarded the construction contract for ₹35 crore.
4. How long will construction of the Sadahalli underpass take?
NHAI expects the project to take approximately one year, with the work carried out in phases to reduce disruption to traffic.
5. Will traffic diversions affect airport travellers at Sadahalli Junction?
Yes. Diversions are expected during construction on Ballari Road. Motorists travelling towards Kempegowda International Airport should follow traffic instructions and allow extra travel time.
6. What other road projects are planned near Bengaluru Airport Road?
NHAI is developing a service road near Yelahanka Air Force Station, with the first phase expected before Aero India 2027. Cut and cover construction is planned after February.
