The bridge has three spans. The central span is 1,991 m (6,532 ft),[1] and the two other sections are each 960 m (3,150 ft). The bridge is 3,911 m (12,831 ft) long overall. The two towers were originally 1,990 m (6,529 ft) 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 (3.3 ft).[1]
http://en.wikipedia.org/wiki/Akashi_Kaiky%C5%8D_Bridge#Structural_form
Although in primary design the AKB was 3,910 meters long overall, with a center span of 1,990 meters, it was extended 1 meter by the Great Hanshin Earthquake...
http://www.worldwidepanorama.org/worldwidepanorama/wwp904/html/YasuhiroFujimoto-49.html
bridges
