MUMBAI: Central Railway, Mumbai Division will operate megablock on its suburban sections carrying out various engineering and maintenance works today. On Main line, the block is on 5th and 6th lines between Vidyavihar and Thane from 8 am to 12.30 pm.There will be no day block on Western Railway todayThe Down Mail/ Express trains viz. Train no 11055,11061 and 16345 will be diverted on Down fast m line at Vidyavihar station and will be re-diverted on 5th line at Thane station and will run 10 to 15 minutes behind schedule during the block period.The Up Mail / Express trains viz. 11010, 12124, 13201, 17221, 12126, 12140 and 22226 will be diverted on Up fast line at Thane station and will be re-diverted on 6th line at Vidyavihar station and will run 10 to 15 minutes behind schedule during the block period.On Harbour line, the block is from 11.10 am to 4.40 pm between CSMT Mumbai and Chunabhatti / Bandra stationsSpecial services will run between Kurla-Panvel at 20 min frequency during the block period. Harbour line passengers are permitted to travel via Main Line and Western Railway till 6 pm today.