Sault Ste. Marie International Bridge southbound

Built in 1962, the Sault Ste. Marie International Bridge spans the St. Marys River between the United States and Canada connecting the twin cities of Sault Ste. Marie, Michigan, and Sault Ste. Marie, Ontario. The bridge is operated by the International Bridge Administration under the direction of the Sault Ste. Marie Bridge Authority, a bi-national governing body consisting of four directors appointed by the governor of Michigan and four appointed by the Canadian government-owned Federal Bridge Corporation. This bridge is a steel truss arch structure with a suspended deck. There are two separate main spans: a double-arch span on the U.S. side and a single-arch span on the Canadian side, which are joined with a long causeway. The double arch spans cross the four U.S. Soo Locks. The single arch spans the single Canadian Lock. In Sault Ste. Marie, Ontario, the bridge ends at a city street, Huron Street, in the downtown core. The total length of the bridge approaches 2.8 miles (4.5 km). The bridge serves as the northern terminus of Interstate 75.