According to a survey by the Global Metro Benchmarking Groups NOVA and CoMET, the Delhi Metro, the London Docklands Light Railway and Bangkok were the best three performers.

"The survey was conducted as per the European Norm 13816, a standard established to evaluate the quality of services provided by public transport companies," said the statement.

The areas covered in the survey were availability, accessibility, ease of use, information prior to travel, information during travel, reliability, customer care, comfort, crowding and security.

"More than 41,000 respondents gave their feedback worldwide in this survey conducted online through the websites and social media links of 18 major metros of the world from April 28th to May 25th earlier this year," said the statement.

Some of the other Metro systems that participated in this survey were Hong Kong MTR, London Underground, Metro De Madrid, Paris RATP, Newcastle Nexus and Metro Rio, added the statement.

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