Gambling revenues that have failed to meet expectation show the need for a more reliable, long-term source of transportation funding, the head of the Illinois Department of Transportation said Tuesday.

Acting Secretary Randy Blankenhorn was not yet prepared to say what that source might be.

"At some point in the near future, something has to happen," Blankenhorn said in a phone interview with The State Journal-Register. "There's a structural issue with the way we have in the past funded infrastructure."

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