The blocks are part of a 12-day programme being carried out from October 7 to 18 for pre-non-interlocking, non-interlocking and post-non-interlocking work, along with the extension of the Up Yard line towards Igatpuri

During the block, all fast-line trains will be diverted to the slow lines between Andheri/Santacruz and Churchgate. The change is expected to affect suburban train operations during the four-hour maintenance period