The Sydney Harbor Bridge is an arch bridge in Sydney that connects the CBD (Central Business District) with the northern area of the city, the North Shore, crossing the Sydney Bay, formed by the mouth of the Parramatta River. It is passable by the subway, vehicular traffic and pedestrians. The construction of the metal arch bridge in a reticular structure dates back to the end of the 1920s. It was completed in 1932, has a span of 503 m and a span of 107 m. It comprises 4 railway tracks and a 17m wide roadway which required the use of 72 locomotives with a total weight of 7000kN to test. hours.