Longest Bridge in the World: Top 10 List and Records

If you’ve ever found yourself staring at a bridge and wondering just how long it could possibly stretch, you’re in good company. The record-holding structures push the limits of what engineers thought achievable, spanning hundreds of kilometers across varied terrain. This article breaks down the top contenders — from Asian rail viaducts to sea crossings — with the numbers that matter and the stories behind them.

Longest Bridge: Danyang–Kunshan Grand Bridge, 164.8 km · Location: Jiangsu, China · Type: Viaduct · Opened: 2011 · Second Longest: Cangde Grand Bridge, 115.9 km

What are the top 10 longest bridges in the world?

When measuring bridges by total length, the top positions are dominated by high-speed rail viaducts in China. These elevated structures carry bullet trains at 300 km/h across hundreds of kilometers of rice paddies, canals, and lakes. The Danyang–Kunshan Grand Bridge holds the Guinness World Record for longest bridge by total length at 164.8 km — that’s roughly the distance from Los Angeles to San Diego, except it was built in a straight line.

“It also set a Guinness World Record for being the world’s longest bridge by total length.”— Mastt, construction industry publication

Danyang–Kunshan Grand Bridge

The Danyang–Kunshan Grand Bridge stretches 164.8 km along the Beijing-Shanghai High-Speed Railway, crossing through Jiangsu province. Construction began in 2006 and finished in 2010, with the structure formally opening in 2011. The project cost $8.5 billion and employed over 10,000 workers simultaneously during peak construction phases, according to We Build Value (engineering publication specializing in infrastructure records). A notable 9-kilometer section crosses Yangcheng Lake, adding scenic views to commuters on what is essentially a floating railway.

Cangde Grand Bridge

Third on the all-time list, the Cangde Grand Bridge measures 115.9 km and also supports the Beijing-Shanghai high-speed rail corridor. It features 3,092 concrete pillars and was completed in 2010 alongside its longer sibling. The structure demonstrates how Chinese infrastructure planning treats long-distance rail corridors as single integrated mega-projects rather than independent segments.

Top 10 full list

The rankings below reflect total bridge length — continuous end-to-end measurement including all approach ramps and connecting sections.

What are the top 3 longest bridges in the world?

The top three longest bridges globally are all viaducts constructed for high-speed rail, each exceeding 100 kilometers in total length. These structures were built as unified engineering projects rather than incremental expansions, explaining their extraordinary scale.

1st: Danyang–Kunshan Grand Bridge

At 164.8 km, the Danyang–Kunshan Grand Bridge holds the world record for total bridge length. It carries the Beijing-Shanghai High-Speed Railway across the Jiangsu lowlands, including a 9-kilometer segment over Yangcheng Lake, according to Times of India (major South Asian news outlet covering travel infrastructure).

“The longest bridge in the world boasts even more noteworthy dimensions: in fact, it reaches an extension of 164,800 metres.”— We Build Value, engineering publication

2nd: Changhua–Kaohsiung Viaduct

Taiwan’s Changhua–Kaohsiung Viaduct spans 157.317 km, designed to resist seismic activity given the island’s earthquake risk. Construction began in 1999, and the structure opened in 2007 at an estimated cost of $8-8.5 billion, per Mastt (construction industry publication with infrastructure focus). The anti-seismic design allows the structure to flex during earthquakes without collapsing.

3rd: Tianjin Grand Bridge

The Tianjin Grand Bridge measures 113.7 km and is also part of the Beijing-Shanghai high-speed rail network. Its construction contributed to the $32-34.7 billion total cost of the entire high-speed rail corridor, as documented by Mastt. Some sources list the Kita-Yaita Viaduct in Japan (114.424 km) as third-longest, creating mild ranking disputes that reflect different measurement methodologies.

What this means: the distinction between 3rd and 4th place depends heavily on how you count approach structures and connected ramps — a methodological ambiguity that keeps rankings slightly fluid across sources.

What is the longest continuous bridge over water in the world?

When the metric shifts from total length to continuous over-water length, a very different structure claims the top spot. The Lake Pontchartrain Causeway in Louisiana stretches 38.442 km over water without interruption, making it the world’s longest bridge over water in a single continuous span.

“It holds the Guinness World Record for the longest continuous bridge over water.”— Times of India, travel infrastructure outlet

Lake Pontchartrain Causeway details

The Lake Pontchartrain Causeway is a twin-spine causeway bridge that crosses the lake north of New Orleans. Its first span opened in 1956; a parallel second span followed in 1969, creating the configuration visible today, per Mastt. The bridge sits on over 9,500 concrete pillars driven into the lake bed, supporting a roadway that floats above the water rather than filling or grading the lake floor.

What makes this record particularly significant is the “continuous” qualifier. The Danyang–Kunshan Grand Bridge may be four times longer, but most of its length crosses land. The Lake Pontchartrain Causeway has no land beneath it for nearly 40 kilometers — you could drive from Manhattan to the Bronx entirely over water if Manhattan were relocated to Louisiana.

Comparison to viaducts

The Lake Pontchartrain Causeway held the title of world’s longest bridge overall for nearly 50 years until Chinese viaduct construction accelerated after 2010. As documented by Times of India, Asian high-speed rail viaducts then displaced American infrastructure from the record tables almost overnight. Yet for drivers seeking the longest uninterrupted water crossing, the Louisiana causeway remains unmatched.

The catch: American bridges dominate the over-water category not because of active investment but because of geographic necessity — Louisiana’s wetlands forced engineers to elevate roads over water rather than build on fill.

What is the longest bridge through the sea?

Sea-crossing bridges face distinct engineering challenges compared to freshwater or land viaducts: corrosive saltwater, stronger wave forces, greater foundation complexity, and the need to accommodate maritime vessel traffic below.

Hong Kong-Zhuhai-Macau Bridge

The Hong Kong-Zhuhai-Macau Bridge (HZMB) stretches 55 km in total, with 29.6 km crossing the Pearl River Delta sea area. A 6.7-kilometer underwater tunnel connects the bridge sections, creating a bridge-tunnel system rather than a pure bridge. Engineering analyses from History of Bridges (infrastructure reference site) note the structure’s complexity stems from crossing three different administrative jurisdictions with distinct regulatory frameworks.

Sea-crossing engineering

Sea bridges must balance three competing demands: providing sufficient clearance for ships below, resisting typhoon wind loads, and maintaining stability against saltwater corrosion. The HZMB incorporated artificial islands at each end to transition between the bridge spans and the underwater tunnel — a technique borrowed from Danish and Japanese offshore engineering practices. The bridge’s 55-kilometer total length makes it the longest sea bridge cluster in the world, though the Jiaozhou Bay Bridge in China (26.7 km) previously held the “longest bridge over water” title before the metric became more precisely defined.

The implication: sea-crossing bridges prioritize clearance over length — the HZMB’s 55 km seems modest next to the 164.8 km Danyang–Kunshan viaduct, but it crosses open ocean rather than rice paddies.

What is the longest suspension bridge in the world?

Suspension bridges are measured differently from viaducts: their record depends on main span length — the distance between towers — rather than total structure length. When the metric is main span, a different set of structures dominates.

Current record holder

The 1915 Çanakkale Bridge in Turkey opened in March 2022 with a main span of 2,023 meters, claiming the world record for longest suspension bridge main span, according to World Population Review (data aggregation platform tracking infrastructure records). The bridge crosses the Dardanelles Strait, connecting European and Asian Turkey with a structure visible from the ancient battlefields of Gallipoli.

Comparisons by span

The Akashi Kaikyo Bridge in Japan held the suspension span record for 24 years until the 1915 Çanakkale exceeded it by 32 meters. Akashi Kaikyo’s main span is 1,991 meters, still the second-longest suspension span globally, per World Population Review. For cable-stayed bridges — where the deck is supported by directly attached cables rather than suspended — the Russky Bridge in Russia holds the main span record at 1,104 meters.

The pattern: total length records belong to rail viaducts, while span records favor suspension and cable-stayed bridges. These are fundamentally different engineering categories solving different problems — one maximizes continuous distance, while the other maximizes unobstructed clearance below.

What this means: suspension bridges win the span race but lose the length race — their anchorages and cables make continuous viaducts impractical, so engineers use them specifically to cross wide obstacles with minimal obstruction.

What is the longest bridge in the US?

The United States holds a modest position in global length rankings, but dominates certain over-water categories. American bridges tend to be older than their Asian counterparts, often serving interstate highway systems rather than high-speed rail networks.

The longest bridge in the United States by total length is the Lake Pontchartrain Causeway at 38.442 km, which doubles as the world’s longest continuous over-water structure. The Manchac Swamp Bridge in Louisiana ranks second at 36.71 km, running across the Manchac wildlife corridor at approximately 1.2 meters above water level, per Wikipedia (collaborative encyclopedia tracking bridge databases). Both structures are elevated causeways through wetland areas rather than sea crossings.

American infrastructure investment patterns explain this disparity: the Interstate Highway System prioritized car mobility over rail transit, and the few elevated rail projects built after 1970 (such as Seattle’s Sounder or portions of the Northeast Corridor) did not generate mega-bridge construction on the Asian scale. The Manchac Swamp Bridge opened in 1979 at a cost of approximately $7 million per mile, per Bridge Masters (bridge engineering contractor site), costs dwarfed by modern Chinese mega-project budgets.

The implication: the US built its longest bridges to cross waterlogged terrain, while China built its longest bridges to carry high-speed trains across flat agricultural land — different engineering imperatives producing different record holders.

Related reading

• Wikipedia: List of longest bridges
• We Build Value: Bridges — Longest in the World
• World Population Review: Longest Bridge Rankings

Related reading: biggest country in the world

While Asian viaducts claim top length records, iconic suspension spans like the Golden Gate Bridge facts highlight timeless engineering innovation and visitor appeal.

Frequently asked questions

The trade-off for engineers designing mega-bridges: length and span represent different optimization goals. Total length maximizes rail corridor continuity across varied terrain; main span maximizes waterway clearance for shipping. No single bridge type wins both categories, which explains why the record lists look so different depending on which metric you apply.