The single unused line branching out from Ikrah Junction was actually the old Andal-Ikrah-Churulia-Rupnarayanpur branch line. It fell into disuse and was scrapped by iron mafias. The new Brarabani Churulia line route that has been planned doesn't follow this old route. One of the greatest poets of Bengal and freedom fighters, Kazi Nazrul Islam was born in Churulia and used to travel to his hometown via this route.
Please refer to the following links for a greater information on the subject:-
click here
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more... click hereHere's an old map from the website with the new line planned highlighted in green.
Although there is a high doubt that the new government will move forward with the project. Hope is still there :)