BMRCL Prepares Feasibility Report for 10.5-km Yellow Line Extension to Attibele

Bengaluru Metro Rail Corporation Limited (BMRCL) has prepared a feasibility report to extend Namma Metro’s Yellow Line from Bommasandra to Attibele near the Karnataka-Tamil Nadu border. The proposed 10.5-kilometre elevated corridor marks a fresh push toward establishing an interstate metro link connecting Bengaluru with Hosur.

The alignment is planned to run primarily along the right side of National Highway 44 near Hosur Road, with underground sections under consideration where necessary to navigate complex stretches. BMRCL is also likely to invite tenders to prepare a Detailed Project Report (DPR) for the extension.

The proposed Karnataka section is expected to feature nine stations. The first station is planned near the Narayana Hrudayalaya hospital campus after Bommasandra. Subsequent stations are slated for Chandapura Circle, Old Chandapura, Thirumagondanahalli, Balagaranahalli, Attibele Industrial Area, Yadavanahalli, and Attibele, alongside one additional station along the route. These stops are intended to serve growing residential and industrial belts across Chandapura, Marsur, Suryanagar, Jigani, and Giddenahalli.

The move follows an announcement in the Tamil Nadu Budget regarding plans for a 12-kilometre metro corridor between Hosur and Bommasandra. A separate feasibility study by Chennai Metro Rail Corporation Limited (CMRL) indicated that part of its proposed line would cross into Karnataka, with the two networks expected to converge near the Attibele-Hosur border.

However, technical compatibility remains a critical challenge. BMRCL previously highlighted differences between the two systems, noting that Bengaluru operates six-coach trains while Tamil Nadu’s planned corridor involves three-coach configurations. Discrepancies in traction and overhead electrification systems also complicate direct operational integration.

To address these hurdles, officials have discussed terminating both metro lines at their respective state borders and linking the two terminal stations at Attibele via a pedestrian skywalk or footbridge. Revenue-sharing mechanisms and operational frameworks between the two states will also need to be resolved before the DPR is finalised.