Thiruvananthapuram Outer Ring Road (NH-866) Route Map, Alignment, Tender & Land Acquisition (2026)
The Thiruvananthapuram Outer Ring Road (ORR), officially designated as National Highway 866 (NH-866), is a flagship 62.7-km four-lane access-controlled greenfield ring highway corridor connecting Navaikulam to Vizhinjam in Kerala.
Originating at Navaikulam (NH-66 Junction, Ch. 0.000) in the north and terminating at Vizhinjam (Ch. 62.700) in the south, the project is structured under the Build-Operate-Transfer (BOT - Toll) mode with an NHAI tender value of ₹8,004.72 crore and a 1,095-day construction period.
"The Thiruvananthapuram Outer Ring Road (NH-866) is a 62.7-km four-lane access-controlled greenfield highway corridor connecting Navaikulam (NH-66) to Vizhinjam in Kerala. Tendered by NHAI under BOT (Toll) mode at ₹8,004.72 crore tender value with a 1,095-day construction period, co-funded with ₹3,200 crore Kerala Government land acquisition across 24 villages."
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Thiruvananthapuram Outer Ring Road (NH-866) Route Map & Alignment
View and download the latest Thiruvananthapuram Outer Ring Road route map showing the project alignment, major junctions, districts covered and connectivity corridors.
Thiruvananthapuram Outer Ring Road Technical Specs & Project Parameters
| Parameter | Technical Specification |
|---|---|
| Official Project Name | Thiruvananthapuram Outer Ring Road (National Highway 866 / NH-866) |
| Total Corridor Length | 62.7 km (4-Lane Access-Controlled Greenfield Ring Highway) |
| Estimated Cost | ₹8,004.72 Crore (NHAI Tender Value) |
| Implementing Authority | National Highways Authority of India (NHAI) |
| Corridor Width / RoW | 4-lane access-controlled greenfield cross-section with service roads & tunnels |
| Corridor Start Point | Navaikulam (NH-66 Junction, Ch. 0.000) |
| Corridor End Point | Vizhinjam International Seaport (Ch. 62.700) |
| Development Model | Build-Operate-Transfer (BOT - Toll) under Bharatmala / NHAI |
| Current Project Status | Tendering Active / Land Acquisition Stage |
| Target Completion | 1,095 Days (Period of Work) |
Corridor Alignment & Engineering Features
Corridor Alignment & Key Nodes
The 62.7-km ring corridor initiates at Navaikulam on NH-66 and sweeps circumferentially around the Thiruvananthapuram metropolitan area via Kilimanoor, Thekkada (SH-1 MC Road junction), Mangalapuram / Pothanicode link, Nedumangad, Kattakada, and Balaramapuram, providing a direct dedicated conduit into Vizhinjam. The highway features a 4-lane access-controlled dual carriageway, grade-separated trumpet interchanges, tunnels, and dedicated service roads.
Vizhinjam Port Connectivity & Freight Logistics
As a critical logistic backbone for South India, NH-866 directly bypasses congested municipal corridors of Thiruvananthapuram city, enabling heavy container freight from Vizhinjam to transition rapidly to national logistics routes (NH-66, MC Road, and interstate freight channels toward Tamil Nadu and Central Kerala).
Tender Framework & Implementation Model
Received final PPPAC approval in March 2026 (140th PPPAC meeting on 9 March 2026). The NHAI has invited open competitive bids under a Build-Operate-Transfer (BOT - Toll) concession model valued at ₹8,004.72 crore for the complete 62.7 km length from Navaikulam to Vizhinjam with a 1,095-day construction period. The construction tender submission deadline is 7 October 2026, 11:00 AM, with technical bid opening on 8 October 2026, 11:30 AM.
Land Acquisition & State Participation
The Government of Kerala has sanctioned ₹3,200 crore for land acquisition across 24 villages along the alignment. Land has already been acquired in 11 villages (~100 ha), with acquisition ongoing across the remaining 13 villages (~200 ha).
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Thiruvananthapuram Outer Ring Road Timeline & Milestones
State Land Acquisition Sanction
Government of Kerala sanctioned ₹3,200 crore towards land acquisition across 24 villages along the 62.7-km corridor alignment.
Final PPPAC Approval
The Public Private Partnership Appraisal Committee (140th PPPAC meeting) granted final approval for executing the 62.7-km 4-lane NH-866 corridor under Build-Operate-Transfer (BOT - Toll) mode at ₹8,004.72 crore tender value.
Environmental Clearance Obtained / Recommended
Environmental Clearance was obtained / recommended for the 62.7-km greenfield ring highway corridor.
Tender Submission Deadline
Scheduled closing deadline (11:00 AM) for submission of bids under the active ₹8,004.72 crore NHAI BOT construction tender with a 1,095-day period of work.
Technical Bid Opening
Scheduled opening of technical bids (11:30 AM) for the 62.7-km four-lane Navaikulam to Vizhinjam construction contract.
Thiruvananthapuram Outer Ring Road (NH-866) FAQs
The target completion date is currently scheduled for 1,095 Days Construction Period. Stretches are projected to open in phases as individual packages conclude construction.
The project spans a total length of 62.7 km and is estimated to cost around ₹8,004.72 Crore (NHAI Tender Value).
There are currently 1 civil packages monitored under the project register. Works are distributed across multiple construction partners under active monitoring.
Land acquisition for the corridor is approximately 20% completed overall. Outstanding compensation and clearances are being handled by local project authorities.
The Thiruvananthapuram Outer Ring Road is a 62.7-km four-lane NH-866 corridor connecting Navaikulam to Vizhinjam in Kerala.
The Thiruvananthapuram ORR runs from Navaikulam on NH-66 to Vizhinjam through the Thiruvananthapuram region.
The NH-866 Outer Ring Road has a design length of 62.7 km from Navaikulam to Vizhinjam.
The approved alignment extends from Navaikulam to Vizhinjam, forming an outer corridor around Thiruvananthapuram and connecting the northern NH-66 side with Vizhinjam.
The current NHAI construction tender has an estimated value of ₹8,004.72 crore.
The project is in the tendering and land-acquisition stage. The construction tender is currently open, while final Union Cabinet approval remains pending.
No. Civil construction has not started; NHAI is currently processing the construction tender and related project approvals.
The project received environmental clearance in August 2026, while the NHAI construction tender remains active with bids due on 7 October 2026.
The NHAI tender for the 62.7-km four-lane corridor is valued at ₹8,004.72 crore.
The NHAI tender specifies a construction period of 1,095 days.
Kerala has sanctioned ₹3,200 crore for land acquisition. The project covers 24 villages, with land already acquired in 11 villages and further acquisition required in the remaining villages.
The current NHAI construction tender covers the full 62.7-km Navaikulam–Vizhinjam section of NH-866 rather than a separately tendered Phase 1.
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