* There are some ambiguities, does passenger traffic means the number of passengers boarding and alighting at a station or the number of persons seated in trains passing through the station?
* More than 50% of total passengers carried by IR are suburban travelers and more than 50% of total suburban passengers of IR are carried by Mumbai suburban station. Mumbai, Kolkata, Chennai, Delhi stations shall figure at the top
* Number if long distance paxs boarding & alighting is citeria, again Stations of Delhi, Mumbai, Kolkata shall do the rounds.