Cross-sea traffic ways

Cross-sea traffic ways are vehicle or railroad traffic ways across the sea. Such traffic ways could include bridges or tunnels.

Existing sea bridges

 * Anping Bridge (China)
 * Donghai Bridge (China)
 * Haicang Bridge (China)
 * Hangzhou Bay Bridge (China)
 * Hong Kong–Zhuhai–Macau Bridge (China)
 * Jiangnanshan Bridge (China)
 * Jiaozhou Bay Bridge and Jiaozhou Bay Tunnel (China)
 * Jintang Bridge (China)
 * Pingtan Strait Road–Rail Bridge (China)
 * Xiamen Zhangzhou Bridge (China)
 * Xihoumen Bridge (China)
 * Zhanjiang Bay Bridge (China)
 * Zhujiajian Strait Bridge (China)
 * Øresund Bridge (Denmark-Sweden)
 * Great Belt Bridge (Denmark)
 * King Fahd Causeway (Saudi Arabia-Bahrain)
 * Bandra–Worli Sea Link (India)
 * Pamban Bridge (India)
 * Mumbai Trans Harbour Link (India)
 * China Maldives Friendship Bridge (Maldives)
 * Chesapeake Bay Bridge–Tunnel (United States)
 * Hampton Roads Bridge–Tunnel (United States)
 * Monitor–Merrimac Memorial Bridge–Tunnel (United States)
 * Golden Gate Bridge (United States)
 * Overseas Highway (United States)
 * Confederation Bridge (Canada)
 * Tokyo Bay Aqua-Line (Japan)
 * Michael Davitt Bridge (Ireland–Achill Island)
 * Amur Bay Bridge (Russia)
 * Kola Bay Bridge (Russia)
 * Russky Bridge (Russia)
 * Zolotoy Bridge (Russia)
 * Muksalma Dam (Russia)
 * Saint Petersburg Dam (Russia)
 * Western High-Speed Diameter (Russia)
 * Bridge across the Malaya Porya Bay (Russia)
 * Road bridge across the Kanda Bay (Russia)
 * Road dam across the Kanda Bay (Russia)
 * Railway bridge across the Kanda Bay (Russia)
 * Railway dam across the Kanda Bay (Russia)
 * Crimean Bridge (Russian-occupied Ukraine)
 * Pelješac Bridge (Croatia)

Sea bridges under construction

 * Shenzhen–Zhongshan Bridge (China)
 * Versova–Bandra Sea Link (India)

Planned or proposed sea bridges

 * Bohai Bay Bridge (China)
 * Gibraltar Bridge (Spain–Morocco)
 * Strait of Messina Bridge (Italy)
 * Bridge of the Horns (Djibouti–Yemen)
 * Bering Strait bridge (Russia–United States)
 * Sakhalin bridge (Russia)
 * Sunda Strait Bridge (Indonesia)
 * Irish Sea Bridge (Great Britain–Ireland)
 * Qatar Bahrain Causeway bridge (Qatar–Bahrain)

Former bridges

 * Kerch railway bridge (Russian SFSR, Soviet Union)

Existing sea tunnels

 * Dalian Bay Subsea Tunnel (China)
 * Qingdao Jiaozhou Bay Tunnel (China)
 * Xiamen XiangAn Tunnel (China)
 * Xiamen–Haicang Undersea Tunnel (China)
 * Channel Tunnel (France-United Kingdom)
 * Seikan Tunnel (Japan)

Sea tunnels under construction

 * 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

Planned or proposed sea tunnels

 * Bohai Strait tunnel (China)
 * Japan–Korea Undersea Tunnel (Japan–Korea)
 * Qiongzhou Strait Tunnel (China)
 * Taiwan Strait Tunnel Project (China)
 * Sakhalin Tunnel (Russia)

Traffic dams

 * Väinatamm (Saaremaa–Muhu)