Mumbai, March 28 -- Commuters on Western Railway's suburban network are set to face major disruption this weekend, with 299 local train services cancelled on account of a 21-hour mega block for infrastructure upgrades between Kandivali and Borivali. Railway authorities on Friday announced the block which will be in place from 10.30pm on Saturday to 7.30pm on Sunday on slow lines, while the down fast line will be affected on Sunday from 1am to 4.30am. Officials said 45 trains will be cancelled on Saturday and 254 on Sunday. Several services will be short-terminated at Andheri and Goregaon, while Borivali platforms 1 and 2 will not be operational. Officials said 25 additional services will be run to reduce inconvenience. "We will use a shadow block to finish some pending works," said an officer.During the period, trains will be diverted to other lines between Goregaon and Borivali, without halts at Ram Mandir, Malad and Kandivali for Virar-bound services....