Major federal transportation legislation enacted in 2005 helped states make gains in highway infrastructure even though problems such as traffic congestion and bridge deficiencies persist, the Reason Foundation said in its 17th annual report on state-owned road systems.

"The nation's continuing trend of generally improving highway performance from 1998 to 2003 was reestablished in 2005 and continued in 2006," said the report from the libertarian, free-market policy group. "Six of seven key performance indicators improved between 2005 and 2006."

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