The Hải Vân Tunnel , the longest tunnel in Southeast Asia and Vietnam at 6.28 km (3.90 mi), lies on Highway 1 between the two cities of Da Nang and Huế in central Vietnam .
7-575: The Hải Vân Pass has long been recognised as a major bottleneck. The concept of a tunnel to bypass the long route over the top had long been sought. Route planning and design work started in January 1998 by a joint venture between Nippon Koei Company Limited Japan and Louis Berger International Inc., USA with the Vietnamese Transport Engineering Design Incorporated (TEDI) providing consultation on
14-458: Is 11.9 m (39.0 ft) wide. A second tunnel running alongside the main tunnel is currently used for maintenance and emergencies but it is planned to expand this at a later date as traffic increases. It is connected to the main tunnel by 15 cross-tunnels. The tunnels have lighting, fire alarms, communication, water supply and treatment, ventilation fans, and radio broadcast systems. The tunnel subsequently has received an award for quality by
21-749: Is one of the 10 biggest construction companies in Japan. It was launched in 2013 by the merger of the Hazama Corporation and Ando Corporation . It has overseas offices in Asia , especially in the South Asian countries like Nepal , as well as in the United States, Mexico, Central and South America . The predecessors of the current company, Hazama and Ando, were established in 1889 and 1873 respectively. The two companies originally formed
28-723: The American Construction Management Association . Drivers not only have to follow Road traffic law but also have to follow these regulations: Currently the single tunnel has one lane of traffic in each direction. As no overtaking is possible this can result in minor delays if motorists are stuck behind slow moving traffic. In May 2021 the toll increased. Vehicles with less than 12 seats, trucks of below two tonnes and buses are charged VND110,000 per trip, while those of 12 to 30 seats and trucks of two to four tonnes have to pay VND160,000 per trip. Motorcycles, cycles and pedestrians are not allowed in
35-593: The project. The tunnel was split into two segments, a southern and a northern section. The southern section (4 km (2.49 mi)) was constructed by a Vietnam–Japan joint venture between the Japanese Hazama Corporation and their Vietnamese partners, Cienco 6 . The 2 km (1.24 mi) northern section was constructed by a joint venture between Korea's Dong Ah construction company and Vietnam's Song Da Construction Corporation. The tunnel officially opened on June 5, 2005. The main tunnel
42-456: The tunnel but a new shuttle service began in November 2006. This shuttle service operates around the clock with a reduced overnight service and a daytime fare of VND25,000 or VND30,000 per motorcycle, VND15,000 per bicycle, and VND10,000 per person. A small waiting area has been established at each end of the tunnel where visitors can take photographs and watch a documentary about the making of
49-410: The tunnel. The tunnel reduces the distance between Đà Nẵng and Huế by 20 km (12 mi) and saves between 30 minutes and an hour on traveling times over the old Hải Vân Pass route. http://dtinews.vn/en/news/017/73819/drivers-complain-about-hai-van-tunnel-toll-fee-rise.html Hazama Ando Hazama Ando Corporation ( 株式会社安藤・間 , Kabushiki-gaisha Andō Hazama , also called 安藤ハザマ) ,
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