At present, the two arms of the bridge is raised manually by 16 workers opening one of the spans on the bridge. But Southern Railway has decided to mechanise the process by installing a single truss span accompanied by electrical motors that will vertically lift the span of the bridge to allow movement of ships. “After this modification, it will be operated by a remote control,” said a top railway official.
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more... new system will also allow for bigger ships to take the route as the vertical-lift span will have an increased width of around 80m from the present maximum navigational clearance of 60m now, the official said. But the maximum height to which the bridge will be allowed to be lifted will be limited by the height of the adjacent road bridge