The concrete structure consist of two semi-circular bridges, joined at either end to create a ring, and was built to replace a raft crossing between the cities of Rocha and Maldonado. On the bridge’s unusual circular design, its architect Rafael Viñoly has a perfectly logical and functional explanation: the curved design will force drivers to slow down the speed of their cars while also prove an opportunity to enjoy the panoramic views of this amazing landscape. The bridge also has a pair of pedestrian walkways.
Via : dezeen
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The Circular Laguna Garzon Bridge in Uruguay