Archive · 5 Jan 2026
India’s Longest Double-Decker Viaduct Planned in Chennai
The Tamil Nadu Government has approved a plan to build a very long, 18.4 km, 6-lane elevated road in Chennai.
This road will go from Kilambakkam Bus Terminus to Mahindra World City.
The pillars of this road are being built in a way that a metro line can be added in the future.
After this road, there are plans to extend the metro line from Kilambakkam Bus Terminus to Chengalpattu.
The detailed project report is being updated before the construction tenders are invited.
Tamil Nadu Government has given in-principle approval for a 6-lane, 18.4-km elevated corridor in Chennai.
The corridor will run from Kilambakkam Bus Terminus (KCBT) to Mahindra World City (Chettipunyam).
Pillars are designed to accommodate a future metro line.
The next phase of the project will extend the metro line from KCBT to Chengalpattu.
The Detailed Project Report (DPR) will be revised before tenders are invited.
- Who
- Tamil Nadu Government and NHAI
- What
- Construction of India’s longest double-decker viaduct
- When
- Approval given, specific timeline not mentioned
- Where
- Chennai, Tamil Nadu
- Why
- To improve connectivity and accommodate future metro line
- Location
- Chennai, Tamil Nadu
- Project Length
- 18.4 km
- Lanes
- 6-lane elevated corridor
- Route
- Kilambakkam Bus Terminus to Mahindra World City (Chettipunyam)
- Future Metro Line
- Pillars designed for future metro line
- Next Phase
- KCBT to Chengalpattu
- Approval Status
- In-principle approval by Tamil Nadu Government
- Project Authority
- NHAI (National Highways Authority of India)
