The project, completed more than 2 months ahead of schedule, is one of four road tunnels built to bypass winding passes in central Vietnam, with the others being Ca, Co Ma and Hai Van.
The entire project, which cost over VND3.92 trillion (US$168 million) is 6.6 kilometres long, including a 2.6-kilometre tunnel and 4 kilometres of approach roads.
Speaking at the inauguration ceremony, Deputy Transport Minister Le Dinh Tho stated that the opening of the road tunnels along the central region will make road travel smoother and safer.
He added that the Cu Mong Tunnel benefits not only the people of Binh Dinh and Phu Yen provinces but also those using National Highway 1, helping to increase passenger and goods traffic.
Construction of the tunnel started in September 2015 and was built using the New Austrian tunnelling method.
Inside the Cu Mong Tunnel
