This station will also have a yard, and it will be the largest underground facility of India, and city's first. It will be 550m long and 41.6m wide, and will facilitate stabling and reversal of rakes, but it will not be a carshed.[4] Previously the station was planned elevated, but after objection from AAI, the route was reworked and the station was planned underground from Airport to New Barrackpore.[5]
As of April 2019[update], the station is planned to be around 150m away from the terminal building.[2] It will be connected via subways which will be having moving walkways.[2]
Here, Kolkata MetroLine 4 and Line 6 will meet. There will be 6 tracks, two for Line 4, two for Line 6, one for terminating and departing both Noapara and Barasat bound trains and one for the yard.
The execution of this project has been entrusted to RVNL and the construction of the station-cum-yard is being done by ITD Cementation India Ltd. The tentative deadline is December 2021.[6]
The work has been delayed for years due to multiple issues. At first AAI objected the station above the ground, stating that this could be a threat for air traffic. Many underground utilities, power sub-station and water treatment plant had to be shifted. Encroachments and Land acquisition problems held up the project for multiple times.[7][8]
