Sixty-eight bridges across the US should be assessed to see if they are at risk of collapse if hit by a ship, transportation safety officials found, while urging the bridges’ owners to undertake immediate vulnerability assessments.

The NTSB identified 68 bridges across the country, including both the east- and west-bound spans of the Bay Bridge and the Chesapeake City Bridge, with an  an “unknown level of risk of

The National Transportation Safety Board is urging Louisiana's transportation department to assess the safety of eight of its bridges, including almost all of the bridges crossing the Mississippi River in the state.