Construction Advances on Six-Lane Underpass in Eastern Hanoi

Construction of the main structure of the underpass at the Cổ Linh junction in eastern Hanoi is advancing. The project began in October 2025. Following foundation work and the relocation of technical infrastructure, contractors are now working simultaneously at multiple sites, aiming to complete the project and achieve a technical opening to traffic before April 30, 2027.

The project has entered the main structural construction phase, with work advancing simultaneously at multiple sites.（VietVance）

According to the design, the underpass will be about 600 meters long and have six lanes. It will include about 100 meters of covered tunnel, about 260 meters of open tunnel, and about 240 meters of retaining walls and wheel guards. Its two ends will connect to Đàm Quang Trung Road and the approach to Vĩnh Tuy Bridge, in an area where several roads meet in eastern Hanoi.

The underpass is designed to be about 600 meters long, with six lanes.（VietVance）

Project progress figures show that supporting infrastructure is about 95% complete, while the main underpass is about 25% complete. Observations at the construction site in early November 2026 showed that barriers had been erected around the center of the junction. Machinery and personnel were working at different locations, and structural and wall-surface work was underway on some of the underpass approaches.

Project progress figures show that the main underpass is about 25% complete.（VietVance）

The Cổ Linh junction connects Cổ Linh Road, Vĩnh Tuy Bridge and Đàm Quang Trung Road and carries heavy traffic. Construction therefore requires careful site organization and traffic safety measures. Once completed, the project is expected to allow some vehicles to pass through the junction via the underpass, reducing direct crossings between traffic streams at ground level, easing pressure during peak hours and improving links between eastern Hanoi and roads leading to the city center.

Source: VietVance