Central Railway announces mega block on main and harbour lines on January 31 Mirror Online / Updated: Jan 29, 2021, 20:12 IST Central Railway (CR) has planned a mega block on the Main and Harbour lines on Sunday. The CR will carry out maintenance work during the mega block. Main Line Byculla – Matunga Up and Dn fast lines from 11.05 am to 4.05 pm Dn fast line services leaving Chhatrapati Shivaji Maharaj Terminus from 10.49 am to 3.44 pm will be diverted on Dn slow line between Byculla and Matunga halting as per respective scheduled halts; re-diverted on Dn fast line at Matunga and will arrive destination 15 minutes beyond schedule.