S bridge
An S bridge is a double-curved bridge, shaped roughly like a shallow letter S, used in early 19th century road construction in the United States. They were generally used for crossing small, curving streams with uneven banks.
An S bridge is a double-curved bridge, shaped roughly like a shallow letter S, used in early 19th century road construction in the United States. They were generally used for crossing small, curving streams with uneven banks.