southern railway is planning doubling of the thiruvananthapuram central-kanyakumari railway line in kerala and tamil nadu. the national institution for transforming india (niti aayog) has given the nod for the 86.56-km project at an estimated to cost rs. 14,319 million. the project is to get the approval from the railway board for the detailed estimate submitted through the zonal railways for track doubling. once the nod is received from the board, the state government is to be approached with the alignment for getting the land. simultaneously, the bids will also be floated by railway to award the works. the final location survey was on the stretch. [info as of: may 17]