The project has an estimated cost of VND5.343 trillion (US$235 million), funded by Japanese official development assistance, and is scheduled for completion in 2020.
According to Duong Viet Roan, head of the Thang Long PMU, which is responsible for the project, the 5.3 kilometre project includes 4.8 kilometres of elevated road with four traffic lanes of 3.75 metres each and two emergency lanes.
The elevated road will follow the standards of an expressway and will allow a maximum speed of 100 kilometres an hour.
The project is divided into two packages with the first 2.7 kilometres from Mai Dich to Co Nhue being undertaken by a consortium of Sumitomo Mitsui and Cienco 4, while the remaining section will be constructed by the Tokyu-Taisei alliance.
Roan said the project would improve the transport infrastructure and significantly reduce congestion on Pham Van Dong Street and the heavy-traffic intersections of Hoang Quoc Viet, Co Nhue and Nguyen Hoang Ton.
Emphasising the immense importance of this project, Hanoi’s deputy chairman Nguyen The Hung said that the capital city would prioritise funding to complete this road on schedule.
Prior to the official start of construction, the Hanoi authorities already chopped down or relocated nearly 1,200 trees lining the third ring road from Mai Dich to the Thang Long Bridge.
In addition to building the viaduct expressway, Hanoi is also carrying out another project to expand the parallel surface street with a total cost of VND3.313 trillion (US$145.8 million) and is scheduled for completion in March this year.
Prior to the Mai Dich-Thang Long section, an 8.5 kilometre viaduct on the capital city’s third ring road has been completed connecting Mai Dich with Linh Dam.