Signalling, power and train faults disrupted Bengaluru metro 15 times in 10 months, data shows
The disruptions resulted in operational delays, trains being withdrawn from service, altered train movements and, in some cases, short-loop operations
In a 10-month span from September 2025 to July 2026, Bengaluru’s Namma Metro network encountered 15 technical disruptions across its Purple, Green and Yellow lines, according to the data. The incidents affected the signalling systems, traction power equipment, train-control components and rolling stock, leading to service delays, train withdrawals, altered movements and in some cases, limited operations.
Bengaluru Development Minister Krishna Byre Gowda informed the Karnataka Legislative Council that the technical problems included signalling failures impacting braking and train-reversal, interruptions in power supply, train-control faults and failures in confirming door closures. These issues can cascade, causing slower or delayed services, overcrowding, and disruptions to passenger connections.
The Purple Line experienced five incidents, including a signalling malfunction near Pattandur Agrahara on September 13, 2025, which caused unintended brake applications. On the Green Line, a communication failure between the driver control system and the Automatic Train Control system on May 5, 2026, prevented a train from operating in Automatic Train Operation mode.
On the Yellow Line, a signalling problem on September 22, 2025, disrupted the reversal arrangement. The minister noted that BMRCL conducts detailed investigations following major incidents and implements corrective measures, including component replacement or upgrades and enhanced maintenance. In response to recurring issues, the corporation may coordinate with BMTC to provide additional or alternative bus services during significant Metro disruptions.
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