From November 12th on-wards we can book tickets before 30 minutes of departure. For passengers convenience, Indian Railways has taken initiatives by preparing charts twice.
Generally charts will be prepared before four hours from the time of departure. But to facilitate this 30 Minutes booking before the time of departure, Indian Railways are preparing a second chart. Second Chart will be prepared before 30 Minutes of departure of the train.
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This helps passengers to book their tickets even 30 Minutes before the time of departure. Also it is surely an additional benefit for Railway Department, as it initiates additional sales.
Officials are making it mandatory to prepare the first chart, four hours before departure. This facilitates passengers to check status and plan their journey.
There is also a danger of finalization of reservation chart or even illegal ticket activists.