Great Bridges Codexery — Data & Quality

We publish our audit record because accuracy claims should be checkable. Every entry on this site runs through an automated fact-audit pipeline (accuracy audit → source-grounded repair → visual QA); this page is generated from that pipeline's own report, not written by hand.

Last full accuracy audit: 2026-08-28 · 5 entries checked · 11 flagged · 22 issues confirmed · 5 corrected · 17 still open

Recent findings (audit lane, verbatim)

The Golden Gate Bridge — The claim that the ferry crossing cost $1.00 per vehicle and driver prior to 1937 is incorrect; the actual fare was $1.00 for a round trip, with a one-way fare typically $0.65.

The Brooklyn Bridge — The elevated pedestrian promenade is not 18 feet above the roadways; it is approximately 10 to 12 feet above them.

The Brooklyn Bridge — [contradicted] The Brooklyn Bridge is the southernmost of four vehicular bridges connecting Manhattan Island and Long Island (the others being the Williamsburg, Manhattan, and Queensboro Bridges; the Queensboro Bridge connects to Queens, not directly to Long I

Tower Bridge — The entry cuts off mid-sentence, leaving an incomplete and potentially misleading statement about the Constable's rights.

Tower Bridge — [contradicted] The operating mechanism was converted to an electro-hydraulic system in 1972 :: The source states the conversion was in 1974 (not 1972).

Sydney Harbour Bridge — The claim that the bridge's general design was a rough copy of the Hell Gate Bridge in New York City is misleading; while Bradfield studied the Hell Gate Bridge, the design was original work by Dorman Long, not a copy.

Sydney Harbour Bridge — The statement that the last rivet was driven through the deck on 21 January 1932 is incorrect; the last rivet was driven on 21 January 1932, but it was driven into the arch, not the deck.

Akashi Kaikyo Bridge — The Sekirei Maru sinking on September 26, 1945 killed 304 people: The correct date is September 26, 1954, not 1945.

The Millau Viaduct — [hero audit] hero image does not depict the subject: MISMATCH The image shows a rural landscape with a village and a road, but the Millau Viaduct is a very tall, modern cable-stayed bridge spanning a va

Royal Gorge Bridge — [contradicted] The first suicide occurred later the same year when a man, Verlyn Edward Bebb, from Pueblo, Colorado jumped off the bridge. :: The source states the first suicide occurred in 1931, but adds that it was later the same year as the incline railway

Royal Gorge Bridge — [contradicted] The aerial tram was opened in 1969, crossing the gorge just east of the bridge. :: The source states the aerial tram opened in 1969. No contradiction.

Mackinac Bridge — [contradicted] Construction cost $100 million :: The source article states 'Total cost estimate at that time was $95 million (equivalent to $887 million in 2024)' and 'Construction ... at a total cost of $100 million' — so $100 million is not contradicted; als

Open data

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Corrections

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