Hải Vân Tunnel
| Hải Vân Tunnel Hầm đường bộ Hải Vân | |
|---|---|
Hải Vân bridge leads to the Tunnel | |
Interactive map of Hải Vân Tunnel Hầm đường bộ Hải Vân | |
| Overview | |
| Location | Between Huế and Đà Nẵng |
| Coordinates | 16°09′46″N 108°06′27″E / 16.1628°N 108.1074°E |
| Status | Operational |
| Route | National Route 1 (Vietnam) |
| Operation | |
| Work begun | 2000 (1st); 2017 (2nd) |
| Opened | 2005 (1st); 2021 (2nd) |
| Character | 2 tunnels |
| Technical | |
| Length | 6,280 m (3.90 mi) |
| No. of lanes | 2 |
| Operating speed | 70 km/h (43.5 mph) |
| Tunnel clearance | 7.5 m (24.6 ft) |
| Width | 10 m (32.8 ft) |
The Hải Vân Tunnel, the second longest tunnel in Southeast Asia (after Singapore's 12.46 km (7.7 mi) long Kallang-Paya Lebar-Marina Central Expressway tunnel) and the longest in Vietnam at 6.28 km (3.90 mi), lies on Highway 1 between the two cities of Da Nang and Huế in central Vietnam.