Top 10 longest cross-sea bridges

The Quanzhou Bay Bridge is located in Quanzhou, Fujian Province, China, on the Quanzhou Bay.

The Bridge started construction on December 31, 2009; the closure project was completed on June 30, 2014; and it opened to traffic on May 12, 2015.

Quanzhou Bay Bridge connects Shishi City and Hui'an County. The total length of the bridge is 16.6 mi (26.7 km ), the Bridge section length is 12.6 mi (20.3 km ), and the Length over water is 7.7 mi (12.5 km ). The main bridge deck on the sea is a two-way eight-lane highway with a design speed of 100 kilometers per hour.

It total cost 6.9 billion yuan (US $1 billion ). Design life is 100 years.

Temburong Bridge (Malay: Jambatan Sultan Haji Omar Ali Saifuddien) is located in Brunei Bay in the northeast of Brunei. It is 18.6 mi (30 km) long and has 4 lanes. It is one of the longest sea bridges in the world. Its length exceeds the second Penang Bridge, the longest sea bridge in Southeast Asia.

Construction of the bridge began in 2014 and will be officially opened to traffic on March 17, 2020. It spent 2.1 billion BND (US$1.6 billion). Its official name is Sultan Haji Omar Ali Saifuddien Bridge.

Donghai Bridge is located in Hangzhou Bay, Zhejiang Province, China. It connects Shanghai and Yangshan Deepwater Port.It is also one of the key supporting projects of Yangshan Deepwater Port (Part of Shanghai Port).

The Donghai Bridge was built on June 26, 2002. On May 25, 2005, the Donghai Bridge was fully opened and a ceremony was held. On December 10, 2005, the Donghai Bridge was officially opened to traffic.

The total length of the Bridge is 32.5 kilometers, the main bridge is 25.3 kilometers, the deck is a two-way six-lane highway, the design speed is 80 kilometers per hour, and the total investment of the project is 7.11 billion yuan (about 1.1 billion US dollars).

Hangzhou Bay Bridge is located in Hangzhou Bay, Zhejiang Province, China. It is a 36 km (22.4 mile) highway bridge across the sea. It connects Jiaxing City and Ningbo City in Zhejiang Province.

The total length of the Hangzhou Bay Bridge is 36 kilometers, and the bridge section is 35.7 kilometers. The bridge deck is a two-way six-lane highway with a design speed of 100 kilometers per hour.

There is a beautiful artificial offshore platform on the bridge called "Haitian Yizhou", which is located in the middle of the Hangzhou Bay Bridge, 1.7 kilometers south of the South Channel.

The total investment of Hangzhou Bay Bridge was 13.8 billion yuan (US $ 2.1 billion) in 2003.

Chesapeake Bay Bridge–Tunnel is a 17.6-mile (28.3 km) bridge–tunnel crossing at the mouth of the Chesapeake Bay, the Hampton Roads harbor, and nearby mouths of the James and Elizabeth Rivers in the U.S.state of Virginia.

The bridge–tunnel originally combined 12 miles (19 km) of trestle, two 1-mile-long (1.6 km) tunnels, four artificial islands, four high-level bridges, approximately 2 miles (3.2 km) of causeway, and 5.5 miles (8.9 km) of northeast and southwest approach roads—crossing the Chesapeake Bay and preserving traffic on the Thimble Shoals and Chesapeake dredged shipping channels leading to the Atlantic.

The original 2-lane bridge-tunnel facility was opened in April 1964, took 4 years to build, and it cost $200 million for planning, design, right-of-way, and construction.After 2 expansions, Chesapeake Bay Bridge + Shoal Tunnel + Trestle total cost US $1.15 billion.

The Great Seto Bridge is a series of double deck bridges connecting Okayama and Kagawa prefectures in Japan across a series of five small islands in the Seto Inland Sea.

Built over the period 1978–88, it is one of the three routes of the Honshū–Shikoku Bridge Project connecting Honshū and Shikoku islands, and the only one with railroad connections included.

The Bridge is 37.3 kilometers long and the sea part is 13.1 kilometers. It consists of 3 cable bridges, 2 cable-stayed bridges and 1 truss bridge.With 13.1 kilometers (8.1 mi) two-tiered bridge, it ranks as one of the world's longest two-tiered bridge system.

The bridges carry two lanes of highway traffic in each direction (Seto-Chūō Expressway) on the upper deck and one railway track in each direction (Seto-Ōhashi Line) on the lower deck.

The project took ten years to complete at a cost of US$7 billion; 3.646 million cubic meters (128.8 million cubic feet) of concrete and 705,000 tons of steel were used in construction. A total of 70 steel rails, 290,600 kilometers of steel cables were used .

Jiaozhou Bay Bridge is located Jiaozhou Bay in China. It is a cross-sea channel in Huangdao District, Chengyang District, Licang District and Jiaozhou City in Qingdao City, Shandong Province, China.Jiaozhou Bay Bridge also called Qingdao Bay Bridge.

The Bridge has a total length of 42.23 kilometers and a bridge length of 31.630 kilometers; the bridge deck is a two-way six-lane highway with a design speed of 80 kilometers per hour.

It transects Jiaozhou Bay, which reduces the road distance between Qingdao and Huangdao by 30 km (19 mi), compared with the expressway along the coast of the bay, reducing travel time by 20 to 30 minutes.

The total investment is 9.53 billion yuan (about 1.5 billion US dollars).

Sheikh Jaber Al-Ahmad Al-Sabah Causeway is located in Kuwait in the Middle East. It is a super sea-crossing bridge built in the Gulf of Kuwait. It connects Kuwait City and Madinat al-Hareer.

The total length of the bridge project is 30.1 mi (48.5 km ). Construction began on November 3, 2013 and opened on May 1, 2019. The construction period is about 4 years. A total of 903 million Kuwaiti dinars (US $3 billion) were spent.

The Hong Kong-Zhuhai-Macau Bridge is a bridge-tunnel project in China that connects Hong Kong, Guangdong Zhuhai and Macau, and is located in the Lingding Ocean area of ​​the Pearl River Estuary in Guangdong Province, China.

The construction of the Hong Kong-Zhuhai-Macau Bridge commenced on December 15, 2009; the main project was completed on July 7, 2017.

The total length of the bridge and tunnel is 55 kilometers, of which the bridge length is 41.6 kilometers, and the main bridge length has reached 29.6 kilometers.The bridge deck is a two-way six-lane highway with a design speed of 100 km / h.

The total investment of the project is 126.9 billion yuan(US $18.8 billion).