To begin with, the Jai Hind metro station was planned to get elevated. However, the AAI objected which the elevated stretch up on the airport could pose a threat to aircraft, so the route was even further reworked plus the station was shifted underground, 150 m from your Airport terminal https://sethfevla.spintheblog.com/32520025/railway-recruitment-kolkata-rrb-group-d-32000-vacancy-pdf