India, Dec. 16 -- The 10.8-km long Thane-Kalyan has become a pain point for the railways. Almost 1,000 trains pass through this stretch every day, while stations such as Thane, Diva and Kalyan also serve as points of interchange for a vast number of daily commuters. The Central Railway authorities are now working on a plan to smoothen train operations and mitigate commuter troubles-studies are underway for laying the 7th and 8th rail lines on the Kalyan-Thane-Parel sector, which includes the possibility of going underground at Dombivli.

The CR authorities have appointed a third-party agency for the final location survey (FLS). This is a detailed survey that stakes out the final alignment for a new line by establishing the precise locatio...