- INTERNAL
Hoang Lien Tunnel is a key transport infrastructure project connecting Sa Pa ward (Lao Cai province), with Binh Lu commune (Lai Chau province). Construction commenced in December 2025 and is scheduled for completion within 24 months.
The project has a total investment of USD 125.3 million and a total length of8.8 km, including the main tunnel, the auxiliary tunnel and connecting roads at both portals. The works are designed in accordance with Japanese standards in combination with Vietnamese standards, meeting high technical and safety requirements.
The tunnel system consists of two parallel tubes with a spacing of 30 m. The main tunnel accommodates two way traffic. The auxiliary tunnel is designated for emergency escape and rescue, connected to the main tunnel by eight cross passages.
Along the alignment, 11 bridges will be constructed to overcome complex mountainous terrain. The project is expected to reduce travel time, enhance transport capacity, and support socio economic development in the region.
Project name | Hoang Lien Tunnel |
Type and classification | Road transport infrastructure (tunnel and mountain road, Class III) |
Total investment | USD 125.3 million |
Duration | 2025 – 2027 |
Location | Sa Pa ward (Lao Cai province), Binh Lu commune (Lai Chau province) |
Role of DEOCA Group | Lead contractor of the construction joint venture, responsible for the main tunnel, auxiliary tunnel, and cross passages |
