WASHINGTON — Between 3% and 8% of federal money earmarked for the highway system since 2010 has gone to waste on inactive projects, according to a new Government Accountability Office Report, which cites lax federal oversight and recommends a narrower role for the Federal Highway Administration.

The report is the result of a request by Rep. Peter DeFazio, D-Ore., a member of the House Transportation and Infrastructure Committee. He asked the GAO to examine how the FHWA’s partnership with state departments of transportation affects its oversight of the roughly $40 billion of federal funds sent to states to maintain and build roads and bridges. His request comes as the Senate transportation bill has proposed new standards that states would have to meet to receive federal funding.

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