Inner Ring Line
| Inner Ring line | |
|---|---|
| Overview | |
| Other names |
|
| Native name | Oḷauṅgura mārga |
| Status | Proposed |
| Owner | Bangalore Metro Rail Corporation Limited (BMRCL) |
| Locale | Bengaluru, Karnataka, India |
| Termini | Yeshwanthpur (proposed) |
| Connecting lines | Operational (3) Yellow Line Purple Line Green Line Upcoming (3): Pink Line Red Line Grey Line |
| Stations | 24(proposed) |
| Website | bmrc.co.in |
| Service | |
| Type | Metro |
| System | Namma Metro |
| Depot(s) | (TBC) |
| History | |
| Planned opening | 2033 (TBC) |
| Technical | |
| Line length | 34 km (21 mi) |
| Number of tracks | 2 |
| Character | (TBC) |
| Track gauge | 1,435 mm (4 ft 8+1⁄2 in) standard gauge |
| Electrification | 750 V DC third rail |
The Inner Ring Line is a proposed metro rail line for the Namma Metro's network in the city of Bengaluru, Karnataka, India by Indian Institute of Science (IISc), featuring 24 stations and Six to Eight interchanges with other lines. A study by the institute has projected that the loop line would increase the overall ridership of Namma Metro by 77 percent. The report also concluded that the emissions of carbon dioxide and particulate matter would reduce by 14.8 percent and 18.6 percent respectively, by 2031.
IISc has recommended the loop line as a better alternative for Government of Karnataka's proposal of city wide tunnel roads. The institute stated that the tunnel roads would lead to an increase in the number of vehicles on the road, as opposed to the line, which would lead to a decrease almost twice the calculated increase with the tunnel roads.
As of February 2026, further deliberation on the proposal has been put on hold, as the state government has instead prioritised feasibility studies for Metro extensions to Bengaluru's satellite towns such as Tumakuru, Devanahalli, Attibele, Hoskote, and Jigani.