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.
Over 2 million cubic meters of concrete were used to build the two-way tunnel, which has six lanes and is 17.45 meters wide, reports China’s official news agency, Xinhua.
The ceiling of the tunnel has been outfitted with colorful LED lights, designed to prevent driver fatigue.
The tunnel is part of the 43.9-kilometer Changzhou-Wuxi Highway, which opened to the public on December 30, 2021. It provides an alternative expressway for travelers journeying between Shanghai and Nanjing, Jiangsu’s capital.
Connecting the expressways of Suzhou, Wuxi and Changzhou, it was built to alleviate traffic pressure on the cities next to Lake Taihu while promoting the economic development of the cities in Yangtze River Delta area.
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