Work began Sunday on the longest bridge across the Red River in Hanoi.
The Vinh Thinh Bridge is designed to withstand earthquakes with magnitudes up to 8 on the Richter scale, officials said.
It will have four lanes each 3.5 meters wide that allow a maximum speed of 80 kilometers per hour.
The concrete bridge, 5.4 kilometers long, will be the seventh one crossing the river. The current longest bridge across the river is Vinh Tuy, which is more than three kilometers long.
Upon completion, the Vinh Thinh bridge will complete the connection between downtown Hanoi and mountainous provinces to the city's northwest such as Vinh Phuc, Phu Tho, Lao Cai, Ha Giang and Yen Bai.
The Ministry of Transport will execute the US$137 million project in three years. It will use $100 million in official development assistance (ODA) given by South Korea.