Central Railway will impose five-hour blocks on CSMT–Vidyavihar and Thane–Vashi/Nerul on Sunday. Main Line slow trains will be diverted, while Trans-Harbour services face cancellations. Western Railway has scheduled a Borivali–Bhayandar night block from Saturday. Mumbai: Mumbai commuters should brace for changes to suburban train services this weekend as Central Railway announced mega blocks on the CSMT–Vidyavihar and Thane–Vashi/Nerul sections on Sunday.