To begin with, the Jai Hind metro station was planned to be elevated. Having said that, the AAI objected the elevated extend up into the airport could pose a threat to plane, so the route was further reworked plus the station was shifted underground, 150 m with the Airport terminal developing. https://riverzovzb.buyoutblog.com/33194395/railway-recruitment-kolkata-rrb-group-d-32000-vacancy-pdf