Delhi Metro Rail Corporation says problems were beyond company control . Problems were caused by engineering inefficiencies or low maintenance .
In the first three weeks of June, commuters had service disruptions on four Delhi Metro corridors.The problems, according to Delhi Metro Rail Corporation, were beyond the company's control because they weren't caused by engineering inefficiencies or low maintenance.On Tuesday, the Yellow Line (Samaypur Badli-HUDA City Centre) and the Blue Line (Dwarka-Vaishali Noida Electronic City) were the most recent two incidents.However, the most dramatic disruptions occurred on the Blue Line on June 6 and 9.The six incidents where metro services were affected ranged from a few minutes to a couple of hours, according to Anuj Dayal, principal executive director (corporate communications), DMRC.He said that even the short delay of just a few minutes on a single segment was due to troubleshooting of the affected train or signalling system, which he said was normal in such a complex network that provides reliable, timely Metro services for the majority of the day.Dayal said that the three times when services were interrupted for an hour to more than two hours were not due to computer problems.According to Dayal, external forces caused the breakdown of a component of overhead equipment (OHE), which included a bird falling between the charged wires and foreign material, such as a wire, kite manjha string, etc., that was dropped by birds or blown by the wind and hitting the OHE. The train travel on both directions had to be suspended to complete any repairs.According to Dayal, DMRC maintained that trains would continue to operate on the major sections of the affected corridors in all three cases, even though the actual delay occurred on a limited area where work had to be done.DMRC has requested Delhi's transportation minister, Kailash Gahlot, to post an investigation report with recommendations made by June 29, 2022.Dayal said that despite the possibility of technical glitches in a complex technological configuration, DMRC has taken a variety of measures to discourage snags from returning in the future. DMRC is also implementing virtual signaling on the Blue and Violet lines, he said, which will allow for uninterrupted services on major sections of a corridor in the event of a breakdown on another section.To create a more robust electrical system, DMRC is also replacing copper split pins on OHE wires with stainless pins.To minimize cable damage, a DMRC official said that the rail company was also identifying and repairing the gaps in viaducts.He said that additional insulators are being installed at around 1,250 locations to improve the technical compatibility between live wire and earthing wire. According to the most recent data in the COMET (2020-21) survey, DMRC, which operates one of the world's biggest metro networks, is not only regarded as one of the world's most punctual metros with a 99.9% completion rate, but it is also ranked among the top three most reliable major metro systems in the country.DMRC shared all data with passengers on Twitter, its smartphone app, and its website virtually in real time, he said, to ensure that those travelling or about to take affected sections could find alternative routes, the latter being readily available now due to the network's 28 interchange stations.