China's longest underwater highway tunnel is now open

After nearly four years of construction, China's longest underwater highway tunnel is now open to vehicle traffic.

At a length of 10.79 kilometers (6.65 miles), the Taihu tunnel stretches under Lake Taihu in eastern China's Jiangsu Province, about 50 kilometers east of Shanghai.

According to government officials in Jiangsu, the tunnel was built at a cost 9.9 billion yuan (about $1.56 billion). Construction began on January 9, 2018.

Ryfast tunnel, which runs between the city of Stavanger and the municipality of Strand.

The underwater tunnel portion of the Tokyo Bay Aqua-Line, a vehicle highway that travels under Tokyo Bay, is 9.6 kilometers.

In terms of underwater tunnels in general, though, the top honor goes to the Channel Tunnel, which connects England and France by rail. Its submerged portion runs for 37.9 kilometers, the longest of any underwater tunnel in the world.

 

Hong Kong–Zhuhai–Macau Bridge - Wikipedia
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Some lakes there are so large they have tides like the ocean.
The mega highways, bridges, tunnels, are about the economy and ease of travel. Bringing the whole country together through infrastructure.
For example, travel to Tibet is easy now with high speed rail and modern freeways.
The trains have extra oxygen piped into the passenger cars for the comfort of people that aren't used to the high altitude and accompanying thin air/low oxygen. High speed trains going to Tibet also have a doctor office incorporated into the train for passengers that may get ill from the high altitude or any other reason.

 

China opens world’s longest sea bridge and tunnel to ...
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China opens world’s longest sea bridge and tunnel to connect Hong Kong and Macau to the mainland

 

Man made 1,500 mile river that runs South to North

1,500-mile
In December 2014, China quietly unveiled one of its South-North Water Diversion Project (南水北调工程): a 1,500-mile canal/tunnel that carries water from central China to Beijing. The goal of this project is to link the Yangzi River (in the South) with the Yellow River (in the North) via tunnels and canals.

 

London to New York City by car?