クイーンズボロ橋
The 20th century was a time of change for the island. The Queensboro Bridge started construction in 1900 and opened in 1909; it passed over the island but did not provide direct vehicular access to it at the time. In 1921, Blackwell's Island was renamed Welfare Island after the City Hospital on the island. In 1930, a vehicular elevator to transport cars and passengers on Queensboro Bridge started to allow vehicular and trolley access to the island.