BMRCL's feasibility study for a 10.5 km Yellow Line extension beyond Bommasandra is complete. Nine elevated stations along Hosur Road would bring the metro to Attibele, where passengers would walk across a 90-metre overbridge to board Tamil Nadu's own metro on the other side.
BMRCL has completed its feasibility study for extending the Yellow Line 10.5 km south from its current terminus at Bommasandra to Attibele on the Karnataka–Tamil Nadu border. The proposal adds nine elevated stations along Hosur Road (NH 44), and the DPR tender is expected soon — bringing Namma Metro to the edge of the state for the first time.
The nine proposed stations read like a tour down Bangalore's southern IT-industrial spine: Narayana Institute of Cardiac Sciences, Chandapura Circle, Old Chandapura, Thirumagondanahalli, Balagaranahalli, Attibele Industrial Area, Yadavanahalli, Attibele, and Attibele Terminal. All nine would be elevated stations built along the right side of Hosur Road.
But the most unusual detail is how the two states plan to connect their metros at the border. Rather than building a seamless through-running line, Karnataka and Tamil Nadu would each construct their own metro up to their respective border sides. At Attibele, a 90-metre foot overbridge would connect the two systems — passengers would simply walk from one metro's station to the other to cross the state line.
It's a pragmatic solution to a bureaucratic reality: Indian metro projects are state-funded and state-operated, so building a single cross-border line would require complex cost-sharing and operational agreements between two state governments. The foot overbridge dodges that entirely — each state builds, operates, and maintains its own section, and the 90-metre walk is the seam.
For commuters along Hosur Road, this extension addresses a genuine pain point. The stretch from Bommasandra to Attibele is one of Bangalore's most congested corridors, feeding traffic between Electronic City's IT campuses and the industrial clusters around Attibele. Thousands of workers currently spend 60–90 minutes in traffic for what should be a 15-minute journey. An elevated metro would cut that to about 20 minutes from Electronic City to Attibele.
The extension also continues the Yellow Line's strategic role as Bangalore's south-east growth corridor. Since opening in August 2025, the driverless line has grown from 3 trainsets to 15, with peak headways improving from 25 minutes to about 7 minutes. Daily ridership has climbed past 92,000, and the Bommasandra–Attibele stretch would tap into a rapidly developing peri-urban belt where housing is affordable but commuting is painful.
The Chandapura area in particular has seen a real estate boom in recent years, with several large gated communities and apartment projects banking on eventual metro connectivity. An announcement of the DPR tender could accelerate that growth further.
If approved, the extension would push the Yellow Line's total length from 18.8 km to about 29 km and increase Namma Metro's network beyond 125 km — not counting the Phase 3 orbital lines that BMRCL is planning separately. The cross-border foot overbridge at Attibele would be the first of its kind in India's metro landscape, and how well it works could set a precedent for other state-border metro connections across the country.