Akashi-Kaikyo Bridge is a suspension bridge located in Akashi Strait between Kobe city and Awaji Island in Hyogo Prefecture. The total and central span lengths are 3,911m and 1,991m respectively. The Bridge was constructed in severe conditions such as high tidal current and deep strait by utilizing state of the art bridge technologies at that time. In order to protect the main cable from corrosion, the dry air injection system (cable dehumidification system) was introduced to the bridge for the first time in the world.
Part of the Kobe-Awaji-Naruto Expressway, the bridge crosses the Akashi Strait from Kobe on Honshu Island with Iwaya on Awaji Island. It has the longest central span of any suspension bridge in the world.
Japan Expressway Holding and Debt Repayment Agency (JEHDRA)
Honshu Shikoku Bridge Expressway Company Limited
Urban Ace Sannomiya Building
Onoedori 4-1-22, Chuo-ku
Kobe 651-0088, Japan
Max. recorded daily traffic
Total length of the bridge
960 m each
Type of girder
Steel Stiffening Truss
Height and width
Clearance for vessels:
65.72 m (215.6 ft)
Type, dimension etc. of main cable/stay cable
The PS (Prefabricated Parallel Wire Strand) method was adopted for cable erection method of the bridge. Each main cable is composed of 290 strands, and each strand consists of 127 wires with the diameter of 5.23mm. Diameter of main cable is 1122mm.
Is the cable structure dehumidified
If so, year established
Means of funding ongoing costs
Last updated: February 7, 2022
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