The longest bridges in the world, ranked by total structure length

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The record table

Ranked by total structure length, which is the figure route engineers and structure inventories work with. A long viaduct on modest piers therefore outranks a shorter but far more dramatic single-span crossing; main span is a separate record.

How this archive measures: lengths, bores, dates and ordering

How this table is compiled

Kilometres are used for routes, metres for structures. Records in this class move whenever one large scheme opens, and a page that is not re-checked drifts out of date without saying so. The unit matters as much as the number: a figure in feet and a figure in metres are routinely mixed up in secondary sources.

Where a record is contested the table states both the figure and the reason for the dispute, instead of picking a winner silently. The date of verification is published with the table. Opening dates refer to the date traffic was admitted, not to the completion of construction, which normally falls a year or two earlier.

Opening year is given, not the year of contract award. Renaming is common on long routes, so a designation in the table reflects the name in use at the time of recording. Corrections have historically arrived by letter rather than by form, and that is still the way most errors in it have been found.

The Danyang-Kunshan Grand Bridge has held the total-length record since 2011 and is part of the Beijing to Shanghai high-speed line. A record is a claim about a definition as much as a measurement. Comparing one country's figure against a neighbour's is more informative than reading either alone, because designation practice differs sharply across borders.

This table records the longest bridges in the world, part of an infrastructure archive kept here since the late 1990s. Superlatives attract dispute because they are the figures most often quoted without their qualifications attached. Geology and terrain decide cost and programme far more than distance does, on a road as much as in a bore.

Reading the figures

European and North American crossings appear much lower on a total-length table than their reputations suggest. The Hong Kong-Zhuhai-Macau crossing is the longest sea crossing, and combines bridge, immersed tunnel and artificial islands in one structure. The archive began as a private compilation and grew through correspondence with engineers and administrations in more than twenty countries.

A superlative is only as good as its definition, and most disputes in this field are definitional rather than factual. Metres are used for structures and kilometres for routes, matching the units the responsible administrations publish. A record table is a snapshot with a date on it, which is the only honest way to publish one.

The bridge table is short by design: only crossings corroborated from two independent sources appear on it. Chinese and Taiwanese high-speed lines dominate the total-length ranking because their alignments run on viaduct for hundreds of kilometres. A projected opening date is a forecast, and on schemes of this size forecasts have historically slipped by years.

Cost figures are omitted throughout, because currency, inflation and differing project scope make them close to meaningless in comparison. Figures are compiled from operator publications, national administrations and the engineering press, and checked against one another. Reading the note column before the figure is usually the faster route to understanding what a record actually claims.

The main-span record is a different contest entirely, and is held by suspension bridges rather than by viaducts. That combination is why it appears on both a bridge table and a subaqueous tunnel table without contradiction. Where a structure crosses an international border it is recorded under both countries rather than assigned to one.