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The Raúl Uranga – Carlos Sylvestre Begnis Subfluvial Tunnel (in Spanish, Túnel Subfluvial Raúl Uranga - Carlos Sylvestre Begnis), formerly known as the Hernandarias Subfluvial Tunnel, is an underwater road tunnel that connects the provinces of Entre Ríos and Santa Fe in Argentina, crossing the Paraná River between the capital of Entre Ríos, Paraná, and Santa Cándida Island, 15 km ...
An underwater tunnel is a tunnel which is partly or wholly constructed under the sea or a river. They are often used where building a bridge or operating a ferry link is unviable, or to provide competition or relief for existing bridges or ferry links. [ 1 ]
Submerged floating tunnels can be anchored to the seafloor (left) or suspended from a pontoon (right) A submerged floating tunnel (SFT), also known as submerged floating tube bridge (SFTB), suspended tunnel, or Archimedes bridge, is a proposed design for a tunnel that floats in water, supported by its buoyancy (specifically, by employing the hydrostatic thrust, or Archimedes' principle).
This fee is called a shadow toll (Spanish: peaje en la sombra). [3] The system can be regarded as a way for the Government to finance the construction of new roads without any initial outlay of money. Also, since payment starts after the road is finished, there are fewer construction delays in comparison with regular state-owned construction.
A special case together with Navarre, the Basque Country has received full powers over most roads in its territory, including the national roads that comprised the primary network, and nowadays only the AP-1 and the AP-68 are under the direct authority of the Spanish government as part of the Red de carreteras del Estado (National Road Network).
The Tokyo Bay Aqua-Line (東京湾 アクアライン, Tōkyō-wan Akua-rain [9]), also known as the Trans-Tokyo Bay Expressway, is an expressway that is mainly made up of a bridge–tunnel combination across Tokyo Bay in Japan.
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The Aztec city-state of Tenochtitlan had causeways supporting roads and aqueducts. One of the oldest engineered roads yet discovered is the Sweet Track in England.Built in 3807 or 3806 BC, [5] the track was a walkway consisting mainly of planks of oak laid end-to-end, supported by crossed pegs of ash, oak, and lime, driven into the underlying peat.