The Highway Trust Fund will need an additional $85 billion in U.S. general fund transfers over the next six years just to keep operating despite recent events that have shown current spending is not enough, a Transportation Department official told a Senate panel Thursday.

The Interstate 5 Skagit River Bridge collapse in Washington state on May 23 has prompted a renewed discussion of American infrastructure needs, DOT undersecretary for policy Polly Trottenberg told members Senate Appropriations Committee's subcommittee on transportation, housing and urban development, and related agencies at a hearing on infrastructure.

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