Nghi Son - Dien Chau Expressway connects with National Highway 45 - Nghi Son Expressway in Nghi Son Town of Thanh Hoa Province and runs 50 km long to Dien Chau District of Nghe An Province.
Costing VND7.3 trillion (US$300 million) of the state budget, the expressway was opened on Sept. 1.
It also measures 17 m wide with four lanes, has a design speed of 80 km/h, no emergency stopping lanes but exit stops in the first phase. The second phase will enlarge it to six lanes across 32 m wide providing a design speed of 100-120 km/h.
The expressway has a tunnel through a mountain, the Truong Vinh tunnel, which runs 450 m long with six lanes cutting through Mong Ga Mountain at the border of Thanh Hoa - Nghe An provinces.
After being put into use, the Nghi Son - Dien Chau and National Highway 45 - Nghi Son expressways have cut the time from Thanh Hoa to Nghe An by half to 1.5 hours, compared to using National Highway 1.
Thanks to them, traveling from Hanoi to Dien Chau District of Nghe An now takes only 3.5 hours instead of about five hours as before.