Akashi Kaikyo Bridge is one of the key links of the Honshū–Shikoku Bridge Project, which created three routes across the Inland Sea. There is a tour 4 days a week from April to November which participants can learn the history in detail and go up to the top of the tower on the bridge which is about 300m in height.
The Akashi–Kaikyo bridge has a total of 1,737 illumination lights: 1,084 for the main cables, 116 for the main towers, 405 for the girders and 132 for the anchorages. Sets of three high-intensity discharge lamps in the colors red, green and blue are mounted on the main cables. The RGB model and computer technology make for a variety of combinations. Twenty-eight patterns are used for occasions as national or regional holidays, memorial days or festivities.
The total cost is estimated at ¥500 billion or US$3.6 billion (per 1998 exchange rates). It is expected to be repaid by charging drivers a toll to cross the bridge. The toll is 2,300 yen and the bridge is used by approximately 23,000 cars per day.