Snapped Bolt Triggers Major Metro Disruption
A snapped bolt on a curved section of Namma Metro's track caused the system's biggest disruption, leaving thousands of commuters stranded in Bengaluru. The incident occurred on June 24, 2026, and led to significant delays and service suspensions across the network.
Details of the Failure
The affected section was on a curve, which requires careful maintenance. Even a slight change in alignment can cause abnormal contact between the current collector device (CCD) and supporting hardware, leading to damage. According to metro officials, the snapped bolt caused a misalignment that resulted in the CCD striking the support structure, causing extensive damage.
Impact on Commuters
The disruption affected services on the Purple Line, one of the busiest corridors, causing delays of over two hours during peak hours. Thousands of passengers were forced to seek alternative transport, leading to chaos at stations. Metro authorities deployed additional buses to manage the crowd, but many commuters reported long waits and overcrowding.
Maintenance and Safety Concerns
This incident has raised questions about the maintenance protocols for curved tracks. A metro spokesperson stated, “We are conducting a thorough investigation and will implement stricter inspection schedules for curved sections.” The Bengaluru Metro has faced previous disruptions due to signal failures and power outages, but this is the first major incident linked to a hardware bolt failure.
Restoration Efforts
Repair teams worked overnight to replace the damaged bolt and realign the track. Services resumed partially the next day, with full restoration expected within 48 hours. The metro authority has assured commuters that safety remains a top priority and that similar failures will be prevented through enhanced monitoring.
