More than 50,000 American bridges are falling apart

More than 50,000 bridges across the U.S. are falling apart and endangering drivers, according to a new report.

NBC News found cases from Florida, Georgia, Michigan and other states where pieces of crumbling bridges broke off and fell to the roadway, sometimes hitting vehicles.

In Utah, driver Mike Peterson escaped serious injury when a chunk of a bridge smashed through his windshield as he drove underneath.

"Another six to eight inches, you might not be talking to me today," said Peterson.

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HALSTEREN, THE NETHERLANDS - UNDATED: The 'Moses Bridge' constructed over a 17th century moat and fortress in Halsteren, The Netherlands. Dubbed the Moses Bridge, this incredible structure literally splits the water way to allow people across. The Biblical feature in Halsteren, in the Netherlands was created to allow visitors access to a 17th century fortress. However, designers RO&AD were charged with creating a feature that did not ruin the original look of the castle's moat. So inspired by Moses, who split the Red Sea to allow the Israelites to flee the advancing armies of the Egyptian Pharoah, they created the 'invisible' bridge. 'Its construction is entirely made of wood, waterproofed with foil,' said Ad Kil, a spokesperson for RO&AD. 'The bridge lies like a trench in the moat, which is shaped to blend in with the outlines of the landscape.' A pump has been integrated into the sunken bridge to stop water flowing into the cavity and stopping it from flooding. PHOTOGRAPH BY RO&AD/ Barcroft USA /Barcoft Media via Getty Images
SPAIN - 2006/10/26: The Puente Nuevo, a bridge over the El Tajo gorge and Rio Guadalev�, spanning the gorge in the historic city of Ronda in the Spanish province of Malaga in Andalusia, Spain. (Photo by Wolfgang Kaehler/LightRocket via Getty Images)
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Henderson Waves is pedestrian bridge, Singapore.
Panorama-Blick vom 700 Meter hohen Berg auf H�gebr�cke 'Sky-Bridge' ('Himmelsbr�cke') mit Besuchern und dahinter Meer Adamanen-See, Insel Langkawi, Provinz Pantai Tengah, Malaysia, Asien, Inseln, Reise, NB, DIG; P.-Nr.: 1836/2011, 25.11.2011; (Photo by Peter Bischoff/Getty Images)
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GATESHEAD, ENGLAND - JUNE 21: The Millennium Bridge opens as part of the opening ceremony for the European Athletics Team Championships at the Quayside on June 21, 2013 in Gateshead, England. (Photo by Stu Forster/Getty Images)

Using government data, the American Road & Transportation Builders Association compiled a report showing that 54,259 American bridges are "structurally deficient."

So many bridges are in need of repair, says the report, that if placed end-to-end they'd stretch nearly from New York City to Miami. And experts say that at the current rate of repair or replacement it would take 37 years to fix all the bridges.

"It really comes down a failure of leadership in Congress to address some of these issues and provide additional funding," said Dr. Alison Black, author of the ARTBA report.

President Trump is expected to address the country's aging infrastructure during his State of the Union address Tuesday night.

In 2016, NBC National Investigative Correspondent Jeff Rossen inspected a Washington, D.C. bridge with Charles Borders, a transportation branch chief with the National Park Service.

Image: The underside of a bridge in Washington.NBC News

"There is metal literally peeling right off of it," said Rossen as he looked at the underside of the structure.

"Look at this flange right here, paper thin. This is all that's left," said Borders.

"This is what's holding up the roadway?" asked Rossen.

"This beam is holding the bridge up," confirmed Borders. "This is the support for the entire bridge. Just completely rusting away."

That bridge has not been fixed.

Late Monday, an official from the Federal Highway Administration told NBC News in a statement, "ARTBA's report, which relies on data from FHWA, underscores the need for investment in our nation's infrastructure. It also highlights the importance of streamlining the permitting process, so that the projects that are funded can move forward without undue delay. The Department of Transportation looks forward to continuing our work with state and local interests to revitalize the nation's roads and highways, offering improved safety, new jobs, and a better quality of life for the American people."

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