Namma Metro Phase 3 to Ease Traffic on ORR and Magadi Road with 34.12 km Double-Decker Flyover

Bengaluru's long-awaited Namma Metro Phase 3 is finally moving ahead. The Karnataka cabinet has approved a ₹9,700-crore project to build 34.12 km double-decker bridges, where a flyover and metro line will run one above the other. With this green signal, construction work is set to begin soon after months of waiting.

The project, led by the Bangalore Metro Rail Corporation Limited (BMRCL), will feature metro lines stacked above flyovers, making it the city's first double-decker corridor.

Two Key Corridors in the Project

The double-decker stretches will be built along two key corridors - JP Nagar 4th Phase to Hebbal covering 28.49 km and Hosahalli to Kadabagere covering 8.64 km.

• JP Nagar 4th Phase to Kempapura (ORR West): A 28.486-km flyover, the longest in Bengaluru.
• Hosahalli to Kadabagere (Magadi Road): An 8.635-km flyover.

Together, the double-decker viaducts will span 37.121 km, slightly shorter than the originally planned 44.65 km.

Funding and Costs

Parliamentary Affairs Minister HK Patil said the ₹9,700-crore cost includes civil works, land acquisition, and design. The funding split is as follows:

Union government: Cost of metro lines

Karnataka state government: 50% of flyover cost

Urban local bodies: 10% contribution

Loans: 40% of funding

The state budget for 2025-26 has already allocated ₹4,000 crore for Namma Metro, a portion of which will be used for this project.

Timeline for Namma Metro Phase 3

The Union cabinet had cleared Phase 3 in August 2024. With the state cabinet's approval now in place:

Tenders for the first four packages, covering stations and viaducts, will be floated in September 2025.

Contractors will get 45-60 days, with finalisation by mid-November 2025.

Groundwork is expected to begin in January 2025.

However, the introduction of the double-decker design has delayed the overall schedule by six months. Phase 3 is now expected to be completed by May 2031, instead of 2030. The cost is also projected to rise by about 5% from the original ₹15,611 crore estimate.

A Boost for Bengaluru's Transport

The Namma Metro Phase 3 double-decker corridors are expected to ease congestion on two of Bengaluru's busiest routes while improving connectivity. Officials say the stacked design will also reduce land acquisition challenges, making it a landmark infrastructure project for the city.