KADAPA: A major train accident was averted by an alert railway keyman between Proddatur-Jammalamadugu section near the railway gate on Sunday night. According to railway sources, keyman Chittibabu found the railway track between Proddatur-Jammalamadugu section sunk due to heavy rain. The Vijayawada-Dharmavaram (17215) Express Train, which had to pass on the track, had arrived 45 minutes late at the railway gate.