A massive flyover is quietly rising over the Aroor-Thuravoor stretch of National Highway 66 in Kerala — and once completed, it could be India’s longest. Spanning 12.75 kilometres and six lanes wide, this elevated highway is expected to significantly ease congestion on one of the busiest sections of Kerala’s transport network.
The project, being handled by the National Highways Authority of India (NHAI), comes with a hefty price tag of ₹2,200 crore. As of now, around 65% of the work is done, with a targeted completion by May 2026.
At the heart of the construction site, more than 2,500 workers and 350 machines are working continuously. All 360 pillars and 3,000 girders have already been built. The girders are now being mounted across the length of the stretch. Three exit ramps and a toll plaza are also under development as part of the plan.
It’s a tight timeline, but work appears to be moving steadily, going by current pace and visible progress.
For regular commuters, the construction is more of a headache than a headline. The existing four-lane road has become a bottleneck, with daily tailbacks and frustrating delays. NH 66 is already one of Kerala’s most congested highways, and the ongoing work has only made things slower.
To tackle this, NHAI has cleared the strengthening of two nearby routes — Thuravoor-Kumbalangi and Thuravoor-Makkekadavu — to act as alternative paths for now. These diversions may not be ideal, but they’re meant to take some pressure off the main highway
Once up and running, the elevated corridor is expected to improve road travel between Kerala, Tamil Nadu, and Karnataka. It could reduce travel time, bring down fuel consumption, and help trucks and passenger vehicles avoid long bottlenecks on the ground. Whether it delivers on all those hopes will depend on execution and post-launch management.
Observers believe that the project could have a meaningful impact on southern India's regional logistics, particularly for trade movement between the three states.
