The Federal Highway Administration started requiring vulnerability assessments of new bridges in 1994, the NTSB said. The Key Bridge was built before that requirement.

The 68 bridges that the NTSB recommends for assessment are those designed before the guidance was established and do not have a current vulnerability assessment, the NTSB said.

The Federal Highway Administration began requiring vulnerability assessments of new bridges in 1994, the NTSB said. The Key Bridge was built before that requirement.

Over the last year, the NTSB identified 68 bridges built before 1991 that don't have a "current vulnerability assessment" and need to be evaluated. Latest U.S.

The bridges include iconic landmarks such as the Golden Gate Bridge, the Chesapeake Bay Bridge, the Brooklyn Bridge and the Mackinac Bridge.

The 68 bridges that the NTSB recommends for assessment are those designed before the guidance was established and do not have a current vulnerability assessment, the NTSB said.

WASHINGTON — Nearly a year since the catastrophic collapse of the Francis Scott Key Bridge after a container ship struck one of its piers, the National Transportation Safety Board is ...

Nearly a year since the catastrophic collapse of the Francis Scott Key Bridge after a container ship struck one of its piers, the National Transportation Safety Board is recommending that the owners ...

Nearly a year since the catastrophic collapse of the Francis Scott Key Bridge after a container ship struck one of its piers, the National Transportation Safety Board is recommending that the owners ...