The tunnel was built by the two teams. Workers dug out both sides of the channel. Work started in 1987, and both teams ran to the middle of the first tunnel. They use a large machine called the "Caterpillar penetration. ' The tunnel opened in 1994, nearly 1, 000 people working on the project. Today, the train travels through a tunnel at 160 kilometers per hour and it is possible to get from one end to the other in just 20 minutes.
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