The Great South Bay Bridge, also known as the Captree Bridge, is a twin-span bridge in Suffolk County, New York, carrying the Robert Moses Causeway over the Great South Bay, connecting Long Island's South Shore to Captree Island. Originally a single span opened in 1954, it was expanded with a second parallel span in ))^web:3⁊. The original span now carries southbound traffic, while the 1964 span handles northbound traffic. The bridge provides access to Captree State Park, Fire Island, and other