The Delhi Metro Rail Corporation follows a strict 59-second benchmark while measuring the punctuality of its trains. Under this operational standard, a train is considered delayed if it reaches its designated destination station more than 59 seconds after its scheduled arrival time.

A train arriving within 59 seconds of its scheduled time is officially recorded as punctual. For example, if the scheduled arrival time is 10 am, arrivals at 10:00:30 am or 10:00:59 am remain within the permitted limit. However, an arrival at 10:01 am is classified as delayed.

DMRC calculates punctuality by comparing the number of trains reaching their destination within the prescribed limit with the total number of trains operated. This narrow margin makes the calculation more demanding than systems that allow delays of several minutes before classifying a service as late.

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According to DMRC, Delhi Metro’s punctuality increased from 98.27 per cent in 2003 to 99.64 per cent in 2005 and subsequently remained around 99.9 per cent. In 2026, the corporation reported a punctuality rate of 99.95 per cent despite the substantial expansion of its network and fleet.

Maintaining such precision is important because even a minor disruption can affect following services, increase waiting times and cause crowding on platforms. Operational coordination has become more demanding as the time between trains on the busiest corridors has decreased from about seven minutes during the Metro’s early years to two minutes and 18 seconds.

Delhi Metro began operations in December 2002 with an 8.4-kilometre corridor and six stations. According to DMRC, the network has since expanded to 416.5 kilometres across 12 lines, comprising 303 stations and 31 interchange stations. Its 99.95 per cent punctuality figure indicates that most trains continued to reach their destinations within the stringent 59-second limit.

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