Expansion proposed for tunnel connecting Binh Dinh and Phu Yen provinces

The Project Management Board 85 has proposed the Ministry of Construction to expand the double tunnel through the Cu Mong Mountain Pass connecting south central Binh Dinh province and its neighbor Phu Yen

The two parallel tunnels are 2.6 km long, with each having two lanes.

Since its operation, the double tunnel has contributed to reduce traffic accidents and ensure traffic flow on the National Highway No 1. However, the amount of vehicles travelling on the highway is estimated to increase rapidly to 25,000 – 27,000 per day, which is likely to cause overload for the tunnel.

Under the proposed plan, a third parallel tunnel will be built with three lanes, allowing a maximum speed of 80 kph. Total investment capital is estimated at over VND1.299 trillion ($50 million), which will be sourced from the public investment capital.

The project’s investment policy is expected to get approval in April and construction is scheduled to start in the fourth quarter of this year. It is projected to be open to traffic from the first quarter of 2027.