Introduction to Sydney Harbor Bridge: The Sydney Harbor Bridge is known as the world's first single-hole arch bridge. It faces the Sydney Opera House across the sea and has become a symbol of Sydney. The world's longest long-wing bridge was opened to traffic in March 1932. It is 502.9 meters long and 48.8 meters wide. It has 8 lanes, 2 railway tracks, 1 bicycle lane and 1 pedestrian path. The biggest feature of the Sydney Bridge is the arch, which has a span of 503 meters and is a single-hole arch, which is very rare in the world.