During the construction process, more than 1600 workers participated in the construction, of which 16 workers unfortunately died in various accidents during the construction process. On March 18, 2007, when she celebrated the 75th anniversary of the opening ceremony, a woman named Olive Kerr attended the ceremony. She talked about her father who had fallen from the bridge when he was building it and died. She couldn't help but shed tears. When her father died, she was only three years old. The whole Sydney Bridge is 1149 meters long, 58.5 meters high from the sea to the bridge deck, 134 meters high from the sea to the bridge top, and 10,000 tons of huge wheels can pass under the bridge. The bridge deck is 49 meters wide and can be used for all kinds of automobiles. There are double-track railways in the middle, and the sidewalks on both sides are 3 meters wide. Tramways were also laid on the original two tracks, which were dismantled due to traffic congestion and divided into eight lanes. The design load of the bridge is 6,000 vehicles, 128 trains and trams per hour, and tens of thousands of people can pass. Nowadays, all kinds of vehicles continue to pass through the bridge 24 hours a day, sometimes nearly 2 million vehicles a day. Sydney Bridge is characterized by its arch, which spans 503 meters and is a single-hole arch, which is rare in the world. The steel frame of the bridge is situated on two huge reinforced concrete piers, which are 12 meters high. There are large balls at the joint of the steel frame and pier. The balls play a regulating role in the expansion and contraction of the steel frame. There is also a tower on the two piers, 95 meters high, all built of granite. At present, the traffic of Sydney Bridge is completely controlled by computer. The towers at both ends of the bridge are equipped with automatic photographic equipment, and the camera lens can automatically change the focal length and angle. As soon as the vehicle enters the bridge, it can record the model number, license plate number, toll and traffic flow of the vehicle. The traffic on the bridge is clearly visible on the TV screen of the computer control center. Patrol cars patrol the bridge, handling all kinds of situations at any time, so that the bridge remains unimpeded.
