Humber Bridge July 1981. With a centre span of and a total length of , the Humber Bridge was the longest single-span suspension bridge in the world for 17 years, until Japan's Akashi Kaikyō Bridge opened on 5 April 1998. The road-distance between Hull and Grimsby was reduced by nearly as a consequence of the bridge. The bridge's surface takes the form of a dual carriageway with a lower-level foot and cyclepath on both sides. There is a permanent speed limit on the full length of the bridge. Each tower consists of a pair of hollow vertical concrete columns, each tall and
Hardanger Bridge estimated to be 2000 vehicles per day. The opening of the bridge took place on 17 August 2013. The main span is one of the longest suspension bridge spans in the world. It is also the longest tunnel to tunnel suspension bridge in the world. On the south end of the bridge, cars immediately enter the Bu Tunnel that goes under the village of Bu, while on the north side of the bridge, cars immediately enter the Vallavik Tunnel which includes a long segment to a roundabout inside the tunnel. At the roundabout, cars can take another long tunnel that