The Akashi Kaikyō Bridge is a suspension bridge, which links the city of Kobe on the Japanese mainland of Honshu to Iwaya on Awaji Island. It was completed in 1998, and has the longest central span of any suspension bridge in the world, at 1,991 metres (1.237 mi). Its total length is 3,911 metres and has a height of 283 metres. Before the Akashi Kaikyō Bridge was built, ferries carried passengers across the Akashi Strait in Japan. This dangerous waterway often experiences severe storms, in 1955 two ferries sank in the strait during a storm, killing 168 people. At this point the Japenese people decided a bridge was required to safely cross this strait. Construction of this 6 lane bridge began in May1988 and was in operation by April 1998.
The bridge has three spans. The central span is 1,991 m and the two other sections are each 960 m. The two towers were originally 1,990 m apart, but the Great Hanshin earthquake on January 17, 1995, moved the towers so much (only the towers had been erected at the time) that the span had to be increased by 1 m.
The bridge was constructed with a dual-hinged stiffening girder system, which allows the structure to withstand winds of 286 kilometres per hour (178 mph), earthquakes measuring up to magnitude 8.5, and extremely rough sea currents. The bridge contains tuned mass dampers that are designed to operate at the resonance frequency of the bridge to dampen the forces putting pressure on the bridge. The two main supporting towers rise 282.8 m above sea level, and the bridge can expand due to heat by up to 2 m (6.6 ft) over the course of a day. Each anchorage required 350,000 tonnes of concrete. The steel cables have 300,000 kilometres of wire: each cable is 112 centimetres in diameter and contains 36,830 strands of wire.
1,737 illumination lights💡
Project cost: 3.6 bn USD💰
23,000 cars use the bridge per day🚘
Toll : 2,300 yen (17 euro)💶
Night view of Akashi Kaikyo Bridge to watch from Awaji service area Ferris Wheel 🎡