Via Bond Buyer.com

Governors and state lawmakers in Dallas, Texas are searching for ways to reinvigorate their transportation funding in 2015 are focusing on the gasoline tax, with a flurry of new highway revenue proposals aimed at increasing collections from the long-time main source of highway spending.

"Gasoline tax hikes are one of the biggest trends we're seeing this year," said Carl Davis, a senior analyst at the Institute of Taxation and Economic Policy. "That's not surprising because revenues are falling short, and states are trying to catch up."

Six states and and the District of Columbia raised their gasoline taxes in 2013 and three more states did so in 2014, Davis said.

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