stated that 84% of the total project work had been completed. The longest orthotropic deck, measuring 180 metres long and weighing 2,400 MT, was launched on 2 November 2022. Current status Noise and vision barriers The MMRDA will install noise and vision barriers on a 6 km section of the MTHL. The vision barriers are intended to block the view of the BARC from the MTHL, while the noise barriers are intended to protect the movement of flamingos and migratory birds at the Sewri mudflats. The MMRDA also stated that it would declare nearly 2 km of the MTHL on the Sewri side as a "silent zone", as well as near schools and other sensitive areas on the Navi Mumbai side of the MTHL. Construction equipment used during the project were fitted with silencers to reduce the potential impact of noise on migratory birds such as flamingos. The project utilized reverse circulation drilling methodology which helps reduce noise levels and helps speed up construction in marine areas. Bird watching platform A 5.6 km long temporary access bridge had been built to transport equipment and workers for the construction of the MTHL. In November 2021, the MMRDA announced that it had decided against demolishing the bridge and would convert it into a bird-watching platform to view flamingos and other birds. The agency noted that the decision would also save the cost of having to demolish the bridge. Metro lines Initially, the MTHL was proposed to have dual metros line below the road lanes on the bridge. The metro line was to be extended to the proposed Navi Mumbai International Airport, and connected to the proposed Ranjanpada-Seawoods-Kharkopar corridor of the Navi Mumbai Metro and the proposed Sewri-Prabhadevi corridor of the Mumbai Metro. However, the MMRDA scrapped plans for the metro line in 2012, and decided to build only a road bridge. An MMRDA official stated, "A detailed study has revealed that laying the foundation for the bridge with provisions for two metro lanes would hike costs instead of save money. Hence, it will be feasible to have a separate bridge for the metro in the future." Another reason given was that the Navi Mumbai International Airport and Sewri-Prabhadevi corridor of the Mumbai Metro were still a long way from completion. In June 2021, the MMRDA stated that it was re-examining the possibility of building metro lines on the MTHL. An MMRDA official