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
Punalur Suspension Bridge was also built to prevent wild animals from getting to the populated side, a bridge which shakes when some one gets on it was built, this shaking scared off the animals and they wouldn't cross the bridge. The bridge is connected to four wells. The iron rods of the bridge is connected to the clips, situated in the wells. Each well is about 100 feet deep and no one since knows the engineering behind the construction of this bridge. It still remains a mystery. A new concrete bridge was built near to the Punalur Suspension Bridge in 1972 due to