Cross-sea traffic ways are vehicle or railroad

traffic Traffic comprises pedestrians, vehicles, ridden or herded animals, trains, and other conveyances that use public ways (roads) for travel and transportation. Traffic laws govern and regulate traffic, while rules of the road include traffic ...

ways across the

sea The sea, connected as the world ocean or simply the ocean, is the body of salty water that covers approximately 71% of the Earth's surface. The word sea is also used to denote second-order sections of the sea, such as the Mediterranean Sea, ...

. Such traffic ways could include

bridge A bridge is a structure built to span a physical obstacle (such as a body of water, valley, road, or rail) without blocking the way underneath. It is constructed for the purpose of providing passage over the obstacle, which is usually someth ...

s or

tunnel A tunnel is an underground passageway, dug through surrounding soil, earth or rock, and enclosed except for the entrance and exit, commonly at each end. A pipeline is not a tunnel, though some recent tunnels have used immersed tube cons ...

Sea bridges

Existing sea bridges

* Anping Bridge (China) * Donghai Bridge (China) *

Haicang Bridge Haicang Bridge () is a suspension bridge located in Xiamen, Fujian Province, China. Built in 1999, it has a main span of 648 meters. Haicang Bridge is a very important bridge that links Xiamen Island (where the city center is located) with the c ...

(China) *

Hangzhou Bay Bridge Hangzhou Bay Bridge () is a long highway bridge with two separate cable-stayed portions, built across the mouth of Hangzhou Bay in the eastern coastal region of China. It connects the municipalities of Jiaxing and Ningbo in Zhejiang province. C ...

(China) *

Hong Kong–Zhuhai–Macau Bridge The Hong Kong–Zhuhai–Macau Bridge (HZMB) is a bridge–tunnel system consisting of a series of three cable-stayed bridges, an undersea tunnel, and four artificial islands. It is both the longest sea crossing and the longest open-sea fi ...

(China) * Jiangnanshan Bridge (China) *

Jiaozhou Bay Bridge Jiaozhou Bay Bridge (or Qingdao Haiwan Bridge) is a long roadway bridge in eastern China's Shandong province, which is part of the Jiaozhou Bay Connection Project. The longest continuous segment of the bridge is , making it one of the longes ...

and Jiaozhou Bay Tunnel (China) * Jintang Bridge (China) * Pingtan Strait Road-Rail Bridge (China) *

Xiamen Zhangzhou Bridge The Xiamen Zhangzhou Bridge is a bridge across the Jiulong River estuary as the river enters Xiamen Bay. The bridge's main cable-stayed bridge span is long, the ninth longest in the world. The cable stayed section is supported by two high tow ...

(China) *

Xihoumen Bridge The Xihoumen Bridge () is a suspension bridge on the Zhoushan Archipelago, the largest offshore island group in China. Linking Jintang and Cezi islands, the bridge, together with the 27-kilometer cable-stayed Jintang Bridge linking Jintang and ...

(China) * Zhanjiang Bay Bridge (China) * Zhujiajian Strait Bridge (China) * Oresund Bridge (Denmark-Sweden) *

Great Belt Fixed Link The Great Belt Bridge ( da, Storebæltsbroen) or Great Belt fixed link ( da, Storebæltsforbindelsen) is a multi-element fixed link crossing the Great Belt strait between the Danish islands of Zealand and Funen. It consists of a road suspension ...

(Denmark) *

King Fahd Causeway The King Fahd Causeway ( ar, جسر الملك فهد, Jisr al-Malik Fahd) is a 25 km (15.5 mi) long series of bridges and causeways connecting Khobar, Saudi Arabia and Al Jasra, Bahrain. Its five bridges rest on 536 concrete pylons, wi ...

(Saudi Arabia-Bahrain) * Bandra-Worli Sea Link (India) *

Pamban Bridge Pamban Bridge is a railway bridge that connects the town of Mandapam in mainland India with Rameswaram on Pamban Island. Opened on 24 February 1914, it was India's first sea bridge, and was the longest sea bridge in India until the opening of ...

(India) *

Mumbai Trans Harbour Link The Mumbai Trans Harbour Link, also known as the Sewri–Nhava Sheva Trans Harbour Link, is an under-construction 21.8 km (13.5 mi) 6-lane expressway grade road bridge, which will connect Mumbai with Navi Mumbai, its satellite cit ...

(India) *

Okha–Beyt Dwarka Signature Bridge The Okha–Beyt Dwarka Signature Bridge is an under construction cable-stayed sea bridge in India, connecting the Beyt Dwarka island in the Gulf of Kutch and Okha. The total length of the bridge is . History Approval for the construction of t ...

(India) * China Maldives Friendship Bridge (

Maldives Maldives (, ; dv, ދިވެހިރާއްޖެ, translit=Dhivehi Raajje, ), officially the Republic of Maldives ( dv, ދިވެހިރާއްޖޭގެ ޖުމްހޫރިއްޔާ, translit=Dhivehi Raajjeyge Jumhooriyyaa, label=none, ), is an archipelag ...

) * Chesapeake Bay Bridge-Tunnel (United States) *

Hampton Roads Bridge-Tunnel Hampton may refer to: Places Australia *Hampton bioregion, an IBRA biogeographic region in Western Australia *Hampton, New South Wales *Hampton, Queensland, a town in the Toowoomba Region *Hampton, Victoria Canada *Hampton, New Brunswick *Hamp ...

(United States) * Monitor-Merrimac Memorial Bridge-Tunnel (United States) *

Golden Gate Bridge The Golden Gate Bridge is a suspension bridge spanning the Golden Gate, the strait connecting San Francisco Bay and the Pacific Ocean. The structure links the U.S. city of San Francisco, California—the northern tip of the San Francisco Pen ...

(United States) *

Overseas Highway The Overseas Highway is a highway carrying U.S. Route 1 (US 1) through the Florida Keys to Key West. Large parts of it were built on the former right-of-way of the Overseas Railroad, the Key West Extension of the Florida East Coast Rail ...

(United States) *

Confederation Bridge The Confederation Bridge (french: Pont de la Confédération) is a box girder bridge carrying the Trans-Canada Highway across the Abegweit Passage of the Northumberland Strait, linking the province of Prince Edward Island with the province of ...

(Canada) *

Tokyo Bay Aqua-Line The , also known as the Trans-Tokyo Bay Expressway, is an expressway that is mainly made up of a bridge–tunnel combination across Tokyo Bay in Japan. It connects the city of Kawasaki in Kanagawa Prefecture with the city of Kisarazu in Chiba ...

(Japan) *

Seikan Tunnel The Seikan Tunnel ( ja, 青函トンネル, or , ), is a dual-gauge railway tunnel in Japan, with a portion under the seabed of the Tsugaru Strait, which separates Aomori Prefecture on the main Japanese island of Honshu from the northern is ...

(Japan) *

Channel Tunnel The Channel Tunnel (french: Tunnel sous la Manche), also known as the Chunnel, is a railway tunnel that connects Folkestone (Kent, England, UK) with Coquelles ( Hauts-de-France, France) beneath the English Channel at the Strait of Dover ...

(United Kingdom-France) *

Michael Davitt Bridge The Michael Davitt Bridge () is a swing bridge in County Mayo, Ireland that crosses from Achill Island to the Mainland. History The plan for a bridge to connect Achill Island to the Corraun Peninsula was considered in the early 1880s. A Mayo Cou ...

(Ireland-

Achill Island Achill Island (; ga, Acaill, Oileán Acla) in County Mayo is the largest of the Irish isles, and is situated off the west coast of Ireland. It has a population of 2,594. Its area is . Achill is attached to the mainland by Michael Davitt Brid ...

) *

Crimean Bridge The Crimean Bridge ( rus, Крымский мост, r=Krymskiy most, p=ˈkrɨmskʲij most), also called Kerch Strait Bridge or Kerch Bridge, is a pair of parallel bridges, one for a four-lane road and one for a double-track railway, spanning t ...

(Russian-occupied Ukraine) *

Pelješac bridge The Pelješac Bridge ( hr, Pelješki most, ) is a cable-stayed bridge in Dubrovnik-Neretva County, Croatia. The bridge provides a fixed link from the southeastern Croatian semi-exclave to the rest of the country while bypassing Bosnia and Herzeg ...

(

Croatia , image_flag = Flag of Croatia.svg , image_coat = Coat of arms of Croatia.svg , anthem = " Lijepa naša domovino"("Our Beautiful Homeland") , image_map = , map_caption = , capi ...

)

Sea bridges under construction

Shenzhen–Zhongshan Bridge The Shenzhen–Zhongshan Bridge is a bridge under construction. It will connect two major cities on the Pearl River Delta (PRD) in China: the city of Shenzhen on the eastern side of the PRD, and the city of Zhongshan on the western side. It wil ...

(China) *

(India)

Planned or proposed sea bridges

* Bohai Bay Bridge (China) *

Gibraltar Bridge The Strait of Gibraltar crossing is a hypothetical bridge or tunnel spanning the Strait of Gibraltar (about 14 km or 9 miles at its narrowest point) that would connect Europe and Africa. The governments of Spain and Morocco appointed a ...

(Spain-

Morocco Morocco (),, ) officially the Kingdom of Morocco, is the westernmost country in the Maghreb region of North Africa. It overlooks the Mediterranean Sea to the north and the Atlantic Ocean to the west, and has land borders with Algeria to A ...

) *

Strait of Messina Bridge The Strait of Messina Bridge is a long-planned suspension bridge across the Strait of Messina, that connects the cities of Messina’s Torre Faro and the port city of Villa San Giovanni in Calabria. While the bridge has been proposed since anci ...

(Italy) *

Bridge of the Horns The Bridge of the Horns ( ar, جسر القرن الإفريقي, translit=Jisr al-Qarn al-ʾIfriqiyy, ) is a proposed construction project to build a bridge between the coasts of Djibouti and Yemen, across the Bab-el-Mandeb, between the Red Sea ...

(

Djibouti Djibouti, ar, جيبوتي ', french: link=no, Djibouti, so, Jabuuti officially the Republic of Djibouti, is a country in the Horn of Africa, bordered by Somalia to the south, Ethiopia to the southwest, Eritrea in the north, and the Red ...

Yemen Yemen (; ar, ٱلْيَمَن, al-Yaman), officially the Republic of Yemen,, ) is a country in Western Asia. It is situated on the southern end of the Arabian Peninsula, and borders Saudi Arabia to the north and Oman to the northeast and ...

) *

Bering Strait bridge A Bering Strait crossing is a hypothetical bridge or tunnel that would span the relatively narrow and shallow Bering Strait between the Chukotka Peninsula in Russia and the Seward Peninsula in the U.S. state of Alaska. The crossing would pr ...

(Russia-United States) *

Sunda Strait Bridge The Sunda Strait Bridge ( id, Jembatan Selat Sunda, ''JSS'', ''Jembatan Selsun'', sometimes referred to in English-language reports as the ''SSB'', Sundanese: ') was a planned road and railway megaproject between the two large Indonesian isl ...

(

Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Gui ...

) * British Isles Connectors (Great Britain-Ireland) * Qatar Bahrain Causeway bridge (

Qatar Qatar (, ; ar, قطر, Qaṭar ; local vernacular pronunciation: ), officially the State of Qatar,) is a country in Western Asia. It occupies the Qatar Peninsula on the northeastern coast of the Arabian Peninsula in the Middle East; it sh ...

-Bahrain)

Sea tunnels

Existing sea tunnels

Dalian Bay Subsea Tunnel Dalian () is a major sub-provincial port city in Liaoning province, People's Republic of China, and is Liaoning's second largest city (after the provincial capital Shenyang) and the third-most populous city of Northeast China. Located on the ...

(China) *

Qingdao Jiaozhou Bay tunnel Qingdao Jiaozhou Bay Tunnel is an under-sea road tunnel located in Qingdao, Shandong Province in eastern China. It crosses underneath Jiaozhou Bay, connecting Huangdao District to the south with Shinan District in the north at the narrow entrance ...

(China) * Xiamen XiangAn Tunnel (China) * Xiamen-Haicang Undersea Tunnel (China) *

(France-United Kingdom) *

(Japan)

Sea tunnels under construction

* The second Jiaozhou Bay Subsea Tunnel (China) * Shantou SuAi Bay Subsea Tunnel (China) * Shenzhen Mawan Cross-Sea Tunnel (China) * Xidian Bay Subsea Tunnel (China) *

Fehmarn Belt Fixed Link The Fehmarn Belt fixed link ( da, Femern Bælt-forbindelsen, german: Fehmarnbelt-Querung) or Fehmarn Belt tunnel is an under-construction immersed tunnel, which will connect the Danish island of Lolland with the German island of Fehmarn, cross ...

Planned or proposed sea tunnels

Bohai Strait tunnel The Bohai Strait Tunnel or Dalian-Yantai Tunnel is a proposed undersea tunnel construction project across the Bohai Strait to connect Dalian on the Liaodong Peninsula with Yantai on the Shandong Peninsula. The official name for the project is ...

(China) * Qiongzhou Strait Tunnel (China) * Taiwan Strait Tunnel Project (China)

Traffic dams

Väinatamm Väinatamm is the name of the largest causeway in Estonia on the Estonian national road 10. The causeway, opened in 1896, connects the island of Muhu, located between Saaremaa and the continent, with Saaremaa. Construction of the causeway cut th ...

(

Saaremaa Saaremaa is the largest island in Estonia, measuring . The main island of Saare County, it is located in the Baltic Sea, south of Hiiumaa island and west of Muhu island, and belongs to the West Estonian Archipelago. The capital of the isla ...

Muhu Muhu (also called Muhumaa in Estonian), is an island in the West Estonian archipelago of the Baltic Sea. With an area of it is the third largest island belonging to Estonia, after Saaremaa and Hiiumaa. Together with neighbouring smaller is ...

)

References

{{Reflist Transport buildings and structures