The Sealdah flyover was shut down to traffic for four days from 6pm on Thursday to facilitate a safety audit and repairs on the structure.
Engineers of the Calcutta Metropolitan Development Authority (CMDA), that maintains the flyover, went to the structure and started inspection on Thursday evening. An engineer said that the flyover would be closed for four days to facilitate load-bearing tests.
According to the officer, the four-day period — from the afternoon of August 15 to the afternoon of August 18 — an engineering consulting agency would mount loaded trucks of capacity ranging between 25 tonnes and 75 tonnes on the flyover.
Officials from the agency will map the load-bearing capacity of the iron rods in the concrete structure using various gadgets.