On the morning of February 10, the Ring Road 2.5 project, Dam Hong - National Highway 1A section, officially opened to technical traffic after 12 years of construction.
The project is invested under the BT (build - transfer) contract form with a length of 1.6km, total investment of about 1,317 billion VND.
The Ring Road 2.5 project, Dam Hong - National Highway 1A section, started in 2014, and was expected to be completed in 2017 but was delayed.
By 2020, the project was temporarily suspended when it had only reached about 40% of the workload. The reason was obstacles in site clearance and extension of the BT contract appendix.
After 5 years of suspension, by the end of May 2025, with the permission of the Hanoi People's Committee, Hoang Mai - Hanoi Construction Investment Co., Ltd. (the project enterprise) organized the Groundbreaking Ceremony for the 2.5 Ring Road construction project, Dam Hong - National Highway 1A section.
To date, the project has basically completed the main items.
The technically opened road ensures synchronous connection with the technical opening plan of the Ring Road 2.5 - Giai Phong intersection underpass project (National Highway 1A), serving people to travel to welcome the Binh Ngo Lunar New Year.
The underpass construction project at the Ring Road 2.5 - Giai Phong intersection was started in October 2022.
The project has a total length of tunnel and access road of 890m in the direction of Ring Road 2.5, of which the closed tunnel is 140m long, the open tunnel is 320m long. The section through the tunnel has 2 lanes in each direction, 3.5m wide/lane, and the section outside the tunnel has 3 lanes in each direction, 3.5m wide/lane.
The underpass project has a total investment of 778 billion VND, invested by the Hanoi Traffic Construction Investment Project Management Board.
This is the 5th underpass in the Capital built from 2009 to date, after Kim Lien, Trung Hoa, Thanh Xuan, and Le Van Luong tunnels.
On the evening of February 9th, the Hanoi Department of Construction issued a notice to temporarily organize traffic flow for vehicles participating in road traffic through the tunnel and the intersection area of Giai Phong street - Kim Dong street - Ring Road 2.5 under the Ring Road 2.5 underpass project with Giai Phong (QL1A) and the Ring Road 2.5 construction project (from Dam Hong to QL1A section).
Time from February 10 to March 31, 2026.
See the traffic diversion plan here.
