Police officials said additional restrictions or diversions may also be imposed depending on traffic conditions and operational requirements during the metro segment launching work. The work  on the long-pending Chingrighata section of Kolkata Metro’s Orange Line will commence along the busy Eastern Metropolitan Bypass from May 15. Kolkata Police have announced major traffic diversion plans around Chingrighata for two consecutive weekends this month, a senior Metro official said on Wednesday. Rail Vikas Nigam Limited (RVNL), the executing agency for the corridor, will undertake segment launching over piers P-317, P-318 and P-319 at Chingrighata as part of the elevated viaduct construction between Kavi Subhas and the airport, he said. In the first phase a closure will be enforced from 8 pm on May 15 to 8 am on May 18 for launching segments between piers P-317 and P-318 across the western flank of the EM Bypass, the official said.…