It was sanctioned in 2009, at a cost of Rs.2070 crore,[3] to enable a quicker commuter service from the northern suburbs to Kolkata.

It would provide the eassy movement to the residents near by BT Road which is huge traffic congesent .

Accordingly Project implemeting agency RVNL has submitted the revised sequence of construction as under .

Laying an additional 60 inches diameter pipe line between Baranagar (Dunlop Bridge) to Barrackpore (Chiriamore) and installation of connection of newly laid 60 inch diameter (MS welded pipe line by Micro Tunneling Method) with existing old 60 inch diameter pipe line and existing 48 inch diameter old pipe line by means of butterfly valve arrangement after taking shut down in stages to suit the site requirements.

The casting of pipe, pile cap and other structural work will be taken up along this 60 inches diameter pipeline on defunct condition without disturbing the 42 inch diameter pipe line as it is not infringing / influencing Metro construction and installation.