The decades-long-awaited upgrade of Western Railway (WR) Mumbai is finally taking shape with work beginning on the ground from December. The idea is to have six parallel lines till Virar and four ones till Dahanu within the next four years. While work on the Virar-Dahanu line is 21 per cent complete with a targeted deadline of 2025, work on Borivli-Virar has also been processed and work began on December 1, with a targeted deadline of 2027. 

At present, there are just two lines for up and down trains between Virar and Dahanu, four lines between Borivali and Virar, and six lines 
between Goregaon and Khar.