# Co Linh tunnel construction in Hanoi

> Live situation record from CLSTR: https://clstr.news/situations/co-linh-tunnel-construction-in-hanoi
> Updated: 2026-08-09T02:49:00.000Z. Sources: 3. Developments: 2.

Construction of the Co Linh tunnel/underpass in Hanoi's Long Bien district is accelerating to meet a technical opening deadline in early 2027, specifically targeting completion before the Tet holiday. 

The 600-meter, six-lane project connects the Vinh Tuy Bridge (Phase 2) with Dam Quang Trung road. Current work involves intensive shifts and overtime to complete the tunnel structure, approach roads, and technical infrastructure. 

While construction has caused increased peak-hour congestion due to narrowed carriageways and temporary fencing, officials expect the completed project to reduce traffic bottlenecks and improve connectivity in eastern Hanoi.

## Timeline

### 2026-08-09: Co Linh underpass construction in Hanoi targets 2027 opening

Construction of the 600-meter, six-lane Co Linh underpass in Hanoi is accelerating, with a goal to reach technical opening before the 2027 Lunar New Year to alleviate traffic congestion.

2 sources. https://clstr.news/cluster/co-linh-underpass-construction-in-hanoi-targets-2027-opening

### 2026-08-05: Co Linh Tunnel Project Speeds Up to Meet Early 2027 Deadline

Hanoi’s Co Linh tunnel construction is being accelerated to finish by 30 April 2027, with contractors adding manpower and overtime. Temporary fencing has narrowed the road, worsening congestion, but the tunnel,

2 sources. https://clstr.news/cluster/co-linh-tunnel-project-speeds-up-to-meet-early-2027-deadline

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Cite as: Co Linh tunnel construction in Hanoi. CLSTR, https://clstr.news/situations/co-linh-tunnel-construction-in-hanoi