Hanoi Approves 10-Lane Expansion of National Highway 1

Hanoi has officially greenlit a significant transportation infrastructure project: the expansion of National Highway 1, which will transform a crucial segment into a 10-lane artery. This ambitious plan, developed by the Hanoi Urban Planning Institute and approved on March 31, 2026, aims to dramatically enhance connectivity and alleviate traffic congestion within the capital region.

The expanded highway will span approximately 36.3 kilometers, commencing at the intersection with Ring Road 1 near Kim Lien Tunnel and concluding at the Cau Gie interchange in Dai Xuyen commune. The route will traverse numerous communes and wards, including Kim Lien, Bach Mai, Phuong Liet, Tuong Mai, Dinh Cong, Hoang Mai, Hoang Liet, Yen So, Dai Thanh, Thanh Tri, Ngoc Hoi, Thuong Tin, Hong Van, Thuong Phuc, Chuong Duong, Phu Xuyen, Chuyen My, and Dai Xuyen.

Designed as a Class A urban road, the project will feature a 90-meter wide cross-section. This includes a 10-lane main carriageway, flanked by two service roads each with three lanes, separated by median barriers. Additionally, there will be side barriers and sidewalks. Certain sections will undergo localized widening to optimize traffic flow and adapt to existing conditions. The project also includes the construction of 11 major interchanges, designed to seamlessly connect with Hanoi's vital ring roads (1, 2, 2.5, 3, 3.5, and 4), National Highway 70, the Olympic Sports Complex urban axis, and Provincial Road 427.

The plan emphasizes the creation of multi-level, interconnected interchanges to maximize traffic capacity and minimize bottlenecks. Notably, the section passing through the Phu Xuyen station area will be realigned to utilize the space freed up by the relocation of the national railway line. This expansion is a key component of Hanoi's broader transportation development strategy, aligning with approved urban planning and ongoing national development initiatives.