A Deep Dive into the World’s Longest Over-Water Bridges

A Deep Dive into the World’s Longest Over-Water Bridges

Explore the top ten longest over-water bridges worldwide! The stories of engineering prowess and human resilience behind them.
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When we talk about the wonders of modern engineering, we certainly can’t leave out overwater bridges. These bridges connect cities, countries and even continents. They show that geographical challenges can be overcome. So what do we mean when we say overwater bridges? Simply put, they are bridges built over bodies of water such as the sea, rivers or lakes.

First of all, overwater bridge construction requires detailed planning and design. Engineers must consider factors such as the depth and flow of the water, the materials to be used and their impact on the local environment. Furthermore, these bridges must be designed to withstand high winds, waves, earthquakes and typhoons. So why go to all this trouble to build overwater bridges? Why these bridges instead of ferries or undersea tunnels?

Why Are These Bridges Important?

The answer lies in the strategic and economic importance of these surface bridges. First of all, they provide permanent, reliable and efficient transportation, strengthening trade and connectivity. They also promote tourism and contribute to cultural exchanges, thus contributing to social and economic development.

Top Ten Longest Over-Water Bridges in the World

This is the top ten list of the world’s longest overwater bridges. Each one is a testament to engineering achievement and human ingenuity.

Danyang-Kunshan Grand Bridge

The Danyang-Kunshan Grand Bridge in China takes the title of the world’s longest overwater bridge. This engineering marvel is 164.8 kilometers long and is part of the Beijing-Shanghai High Speed Railway. You can think of it as connecting two cities as far apart as New York and Philadelphia with a single bridge.

danyang kunshan grand bridge

The bridge stretches over the Yangtze River Delta and crosses over low-lying rice paddies that are mostly covered by water. This bridge is a symbol of China’s engineering capabilities and rapid modernization.

Changhua-Kaohsiung Viaduct

The next bridge on our list is the Changhua-Kaohsiung Viaduct in Taiwan. Approximately 157.3 kilometers long, this bridge is part of Taiwan’s High-Speed Rail system. This massive structure has become a symbol of national pride as well as improving transportation on Taiwan’s west coast.

changhua kaohsiung viaduct

Tianjin Grand Bridge

Another engineering marvel in China, the Tianjin Great Bridge is the third longest overwater bridge in the world at 113.7 kilometers long. It is part of the Beijing-Shanghai High-Speed Railway and shows how the Chinese have mastered the art and science of bridge building.

Cangde Grand Bridge

The Cangde Grand Bridge in China, 105.8 kilometers long, is another important part of the Beijing-Shanghai High-Speed Railway. Despite the region’s high seismic activity, the bridge remains intact.

Lake Pontchartrain Causeway

Moving away from Asia, we come to the Lake Pontchartrain Causeway in the USA. 38.35 kilometers long, this bridge was once recognized by Guinness World Records as the longest overwater bridge. The bridge connects the cities of Metairie and Mandeville in Louisiana and crosses Lake Pontchartrain. For many locals, this bridge is a lifeline that makes daily transportation possible.

lake pontchartrain causeway

Manchac Swamp Bridge

The Manchac Swamp Bridge in the United States is the second longest in the US and the seventh longest in the world. At 36.69 kilometers long, this bridge is part of Interstate 55 in Louisiana.

Donghai Bridge

At 32.5 kilometers long, China’s Donghai Bridge is the seventh longest overwater bridge in the world. It connects Shanghai on the mainland to the offshore deepwater port of Yangshan. The bridge is designed in a unique S-shape to adapt to sea conditions and the strong typhoons that are common in the region..

Hangzhou Bay Bridge

Another testament to China’s bridge-building prowess, the Hangzhou Bay Bridge spans 35.67 kilometers across Hangzhou Bay. This bridge is a practical structure and also a tourist attraction.

longest bridges in the world

Runyang Yangtze River Bridge

The Runyang Yangtze River Bridge in China is a bridge complex 35.66 kilometers long and connects Zhenjiang and Yangzhou. The complex consists of two large bridges towering over the Yangtze River, adding to China’s rich repertoire of overwater bridges.

Zhuhai-Hong Kong-Macau Bridge

Finally, the 34-kilometer-long Zhuhai-Hong Kong-Macau Bridge is the longest sea crossing in the world. It includes an undersea tunnel and four artificial islands, making it one of the most ambitious projects of its kind. The bridge serves as a vital link promoting economic growth and integration in the Greater Bay Area.


In short, overwater bridges are not just engineering marvels. They symbolize connecting, overcoming challenges and continuing to push the boundaries of what is possible.