A crack in the cap of pier number 19 was the reason why engineers decided to close the flyover connecting EM Bypass with VIP Road on Tuesday evening.
Sources in the Calcutta Metropolitan Development Authority (CMDA), the custodian of the flyover, said the crack had been noticed a few days ago.
A Delhi-based agency hired to study the health of the flyover wanted to ascertain whether the crack was static or growing.
“After several rounds of inspection, engineers of the agency concluded that the crack is expanding. They felt more examination was needed and in the meantime traffic should not be allowed on the flyover,” a CMDA official said.
