Largest Bridges in World: Longest Bridges Ranked

Metal bridges are one of the most amazing pieces of modern engineering. Some extend over a river, bay, valley, and even a vast expanse of maritime waters, while others span the highways of the world for high-speed trains with very few stops. They are massive in size and significant engineering feats as well as transportation routes.

If you look for the largest bridges in world, you may be interested in the longest ones by overall length. This is not the longest main span, longest bridge deck, or longest bridge over water. The article emphasizes the overall length of the bridge and also mentions some other important records of the various other major bridges.

Largest Bridges in World by Total Length

The longest bridge in the world, in terms of length, is the Danyang-Kunshan Grand Bridge located in China, with a total length of approximately 164 kilometers (or 102 miles). It is the longest bridge in the world, according to Guinness World Records. It is part of the High-speed Beijing–Shanghai Railway and opened in June 2011.

The bridge stretches through a vast expanse of eastern China and is meant to facilitate high-speed rail travel through waterways, low-lying land, and developed areas. Its massive size indicates that a bridge does not always have to span a single huge body of water. It is also possible to construct a long viaduct to support a fixed route for the railway through hard or built-up terrain.

1. Danyang–Kunshan Grand Bridge

The Danyang–Kunshan Grand Bridge is a 164-kilometer-long Chinese bridge. It carries the Beijing–Shanghai High-Speed Railway, one of the nation’s high-speed railway lines. It is considered to be the world’s longest bridge by Guinness World Records.

Partly due to the nature of the railway corridor, it is of a substantial size. The long viaduct offers a continuous elevated path as opposed to having to repeatedly change elevation and cross numerous individual obstacles with separate structures. This produces a bridge system that is unparalleled in comparison to standard road bridges.

2. Langfang–Qingxian Viaduct

The Langfang–Qingxian viaduct is a massive railway bridge in China. According to Guinness World Records, it is about 114 kilometers long and is the second-longest bridge in the world. It is also a part of the Beijing–Shanghai High-Speed Railway line.

The viaduct is also an example of the need for railways to be built so much as one of the world’s longest bridges. The high-speed trains need to be able to pass over relatively smooth alignments and controlled gradients, and elevated structures can be designed to provide a smooth and efficient alignment where a railway line would be more difficult to construct on the ground.

3. Tianjin Grand Bridge

Another key railway viaduct of the Beijing–Shanghai High-Speed Railway is Tianjin Grand Bridge. It is a long elevated road, part of the long railway with very high speed in China, and has also been part of the long bridge constructions in China.

It is not just the physical length of the railway viaduct that makes it important, like other long railway viaducts. A railway can be elevated to allow it to run over roads, waterways, settlements, agricultural land, and other features without altering its alignment for high-speed trains. This means that very long viaducts become practicable means of transport instead of being just a structure built to be long.

4. Hong Kong–Zhuhai–Macau Bridge

The Hong Kong–Zhuhai–Macau Bridge is not a giant railway bridge, but a bridge, road, artificial islands, and an underwater tunnel. The official Hong Kong- Zhuhai- Macau Bridge website states that the crossing will be 55 kilometers long, with a 12-kilometer Hong Kong Link Road, a 29.6-kilometer main bridge, and a 13.4-kilometer Zhuhai Link Road.

The structure is recognised by Guinness World Records for its 48.3 km length of bridges over water. It is not correct to say all 55 km is a bridge, as this would actually be an undersea tunnel of 6.7 km.

5. Qingdao Jiaozhou Bay Bridge

Jiaozhou Bay Bridge, which is located in Qingdao, is one of the long-distance road bridges in China. It traverses Jiaozhou Bay and is part of the road network of Qingdao and its adjacent regions.

It isn’t for the length of the longest suspension span, but the distance it spans across the bay. This type of large crossing will have a long foundation, supporting works, navigation aspects, and planning considerations, as a significant proportion of the route will be in marine exposure.

6. Hangzhou Bay Bridge

The Hangzhou Bay Bridge is a 36-kilometer-long bridge that spans the Hangzhou Bay of China’s Zhejiang Province. Although not the longest bridge in the world, Guinness World Records says it is the longest bridge across the widest open ocean.

The bridge connects the neighbourhoods of Cixi and Zhapu, and is a vital road access across the bay. The site conditions mean that its design has to be different from that of a long railway viaduct along the coast, where the effects of sea weather and high winds, combined with difficult construction conditions, make the engineering requirements unique.

7. Lake Pontchartrain Causeway

The Lake Pontchartrain Causeway is one of the world’s most famous long water crossings in Louisiana. It has a second causeway which is 38.422 kilometers (23.87 miles) long. It is the longest extended bridge over water, according to Guinness World Records.

This bridge is a crossing between Mandeville and Metairie over Lake Pontchartrain. A bridge over a relatively narrow river, a causeway goes for a very long distance over open water. This is significant when discussing bridges that cross a body of water continuously, as their length plays a major role.

8. Manchac Swamp Bridge

The Manchac Swamp Bridge is a set of two parallel concrete bridges in Louisiana, USA. It crosses Interstate 55 over the Manchac Swamp and is a vital interstate route in a wetland habitat.

It has been built in a different fashion than bridges across oceans. The bridge does not cross a large expanse of open water, but rather a swampy area as a highway. When building above the wetlands, it is possible to keep the road connection intact and reduce the requirement for a standard road through the constructed area.

How Bridge Size Is Measured

No single bridge is the biggest in all respects. The total length of the bridge is the length from one end to the other. The world record speed for the Danyang–Kunshan Grand Bridge is 164 kilometers; that’s the measure.

There are other records that employ different units. By way of example, the world’s longest bridge span is the 1915 Çanakkale Bridge in Türkiye which is 2,023 meters long, as reported by Guinness World Records. This is a reference to the main span between the towers of the bridge, not the length of the bridge.

Longest Bridge Span

In Türkiye, the record for the longest span of a bridge is held by the Çanakkale Bridge, which was built in 1915 and has a span of 2,023 meters. It runs across the Dardanelles and winds through the continent of Europe and Asia in Türkiye. The feat was recorded on 18 March 2022, according to Guinness World Records.

This is not the overall bridge length record! A bridge may consist of a very short span in the middle and a long span at either end. Long-span bridges are particularly beneficial when the designers want to reduce the number of supports in water or other challenging sites.

Longest Suspension Bridge

The 1915 Çanakkale Bridge is also the Guinness Record for the longest suspension bridge span, which is 2023 meters in length. It has a primary span that is hung from the bridge’s towers using suspension cables.

The former leader in this category was the Akashi–Kaikyo Bridge in Japan. According to Guinness World Records, it was anchored to the anchorage with a length of 3,911 m and 1,991 m on its main span. NASA also has a record for its 1,991-m central span.

Longest Bridge Over Water

That’s a matter of the definition of ‘over water ‘. Guinness World Records states that the Hong Kong – Zhuhai – Macau Bridge is 48.3km in total length (bridge over water). The full 55-kilometer crossing also has a 6.7-kilometer undersea tunnel.

The length of the Lake Pontchartrain Causeway is 38.422 km for a continuous bridge over the lake. This distinction is important as several separate bridge sections or artificial islands, approach roads and tunnels may make up the bridge system.

Highest Bridge

However, there are several methods of measuring engineering scale; length is one. Currently, the highest bridge is a bridge in Zhenfeng, Guizhou, China, which is 626.01 meters tall, according to Guinness World Records. That was recorded on 28th April, 2026.

The length of the bridge is 2,890 meters and the main span is 1,420 meters. It is the height of the bridge that makes the words “longest,” “highest,” and “longest span” inappropriate when comparing with the other major bridges.

Tallest Bridge Structure

Another notable bridge record holder is the Millau Viaduct in France. It is listed as the tallest in Guinness World Records at 336.4 m. It was constructed over the Tarn Valley near Millau to complete the motorway between Paris and the Mediterranean.

The roadway is set over a shallow valley that makes it so tall. A bridge can be enormous even if it doesn’t rank near the top of a list by total length, as is this bridge.

Why These Bridges Are So Long

The longer bridges are, they are normally constructed to address particular transportation issues in the world. High-speed trains need a smooth, controlled alignment when travelling by train, and long road bridges can link cities which are separated by bays, lakes, rivers or difficult terrain.

Another key factor is geography. A long elevated section could be necessary for a crossing and wetlands and low-lying areas might make it more feasible to create a raised structure to replace a traditional road/railway built directly on the ground. The final length is thus a result of the route, the terrain, the transportation system, and the engineering requirements.

Materials Used in Large Bridges

Reinforced Concrete (RC) and prestressed concrete (PPC) are commonly used in the construction of large bridges, as are structural steel and a combination of the two. The selection is dependent on the type of bridge, span requirement, environmental conditions, construction method, and anticipated loads.

Repeated concrete spans are suitable for long railway viaducts because they consist of many relatively short spans. Suspension and cable-stayed bridges are of different design systems, since the central span can be hundreds or thousands of meters long. For instance, the main span of the 1915 Çanakkale Bridge is 2,023 meters long with a suspension design.

Long Bridges and Transportation

A big bridge is worth its value only because of the connection it provides. A long railway viaduct can keep a train on a controlled line, and a road bridge can reduce the distance between distant areas.

The Hong Kong – Zhuhai – Macau Bridge is an obvious case of a significant transport link. According to the official project information, it connects Hong Kong, Zhuhai, and Macao via a mix of bridge and tunnel.

Bridges Compared by Record

The table highlights why there is a need for a clear measurement of bridge rank. The Danyang-Kunshan Grand Bridge is the longest bridge in the world and the 1915 Çanakkale Bridge is the longest main span bridge in the world, and the Millau Viaduct is the tallest bridge in the world. The Hong Kong–Zhuhai–Macau Bridge and Lake Pontchartrain Causeway are particularly important when the measurement is specifically related to water crossings.

Engineering Challenges

When constructing a very long bridge, engineers must face ever-changing problems. Water crossings need foundations that are able to cope with moving water and exposure to the environment and bridges that cross wetlands face issues of soft ground and access.

A second need for long railway bridges is that the line must be able to accommodate trains for an extremely long distance. The high-speed railway cannot always follow the natural changes of the ground, and in such cases, the elevation construction can make up for the controlled route needed for efficient operation.

What Makes a Bridge a World Record?

A bridge cannot be a record holder unless it is in a specific type of category. This category can be based on total length, main span, continuous length over water, aggregate length over water, height, or any other particular characteristic.

For instance, the Danyang-Kunshan Grand Bridge is the longest bridge at 164 kilometers in length, and the Çanakkale Bridge of 1915 is the longest bridge span with a length of 2,023 meters according to Guinness World Records. The first and the second are world records, but they record different characteristics.

Future of Large Bridge Construction

The construction of modern bridges still continues to pioneer the span length, height, materials and construction methods. When a single bridge is not sufficient, engineers can be faced with complex arrangements of bridges, tunnels, pseudo islands and elevated approaches.

This is especially reflected in the Hong Kong – Zhuhai – Macau Bridge project. The whole system is composed of large bridge elements, an undersea tunnel and artificial islands, and is designed to form one transport corridor in the Pearl River Delta.

Final Thoughts

No single number is enough to determine the world’s largest bridge. Among them, the Danyang – Kunshan Grand Bridge is the champion in total length, and other bridges are the champion for water crossing length, continuous length, aggregate water crossing length and height.

The buildings demonstrate adaptation of bridge engineering to the specific needs of geography and transportation. The huge railway viaducts in China are one thing; the long water crossings in the USA and Asia are another – every one of the record-holding structures is a different answer to the problem of getting people and goods from one place to another across difficult terrain.

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FAQ’s

What is the largest bridge in the world?

The longest bridge by total length in the world is the Danyang–Kunshan Grand Bridge in China. Guinness World Records records its length at 164 kilometres (102 miles).

Which bridge has the longest span?

In Türkiye, the 1915 Çanakkale Bridge is the world’s longest bridge span with a length of 2,023 meters. This was recognised by Guinness World Records in 2022.

What is the longest bridge over water?

The length of the bridge is 48.3 km over water on the Hong Kong-Zhuhai-Macau Bridge. It’s a 55-kilometer-long complete crossing of a bridge and a tunnel.

What is the longest continuous bridge over water?

The longest continuous bridge over water is the Lake Pontchartrain Causeway spanning the Lake Pontchartrain in Louisiana, USA, with a length of 38.422 kilometers.

Which country has the longest bridge?

The Danyang–Kunshan Grand Bridge is a 164-kilometer-long bridge in China, the longest bridge in the world, according to Guinness World Records.

How long is the Danyang–Kunshan Grand Bridge?

The Danyang Kunshan Grand Bridge is about 164 kilometres (102 miles) long. It is the carrier of the Beijing–Shanghai High-Speed Railway.

Is the Hong Kong–Zhuhai–Macau Bridge 55 km long?

Yes. The whole bridge and tunnel crossing is 55 km in length. The 29.6-kilometer main bridge and the 6.7-kilometer undersea tunnel, as well as the link roads.

What is the highest bridge in the world?

The highest bridge is located in Zhenfeng, Guizhou, China and stands 626.01 meters. (Now, according to Guinness World Records) This record was set on 28th April 2026.