The block will be operated on the UP and DOWN Slow lines between Chhatrapati Shivaji Maharaj Terminus (CSMT) and Vidhyavihar on the Main line, and on the UP and DOWN Trans-Harbour lines between Thane and Vashi/Nerul. Central Railway will operate a mega block on the Mumbai suburban network on Sunday, November 1, to carry out engineering and maintenance work, affecting services on the Main and Trans-Harbour lines.