The current gasoline tax is 24.5 cents per gallon and has not gone up since 1997.
Valentine's measure would keep 14 cents a gallon as a base. The rest would be determined by multiplying 3.69 percent and the previous year's average price per gallon of gasoline before state and federal taxes are added.
Valentine said the calculations are designed to keep taxes flat for the first year, but let them rise thereafter as gasoline prices increase. He said he is negotiating changes with oil companies and may tweak the bill so that prices are adjusted only every three years instead of annually.
In the bill's current form, Valentine said that for every $1 bump in the price of gasoline, a driver who averages 12,000 miles a year would pay an extra $18 in tax annually.
A long parade of local officials, state highway officials and businesses supported the move, saying Utah and local governments have been falling behind in their ability to maintain roads because the gas tax has not been raised in 17 years, resulting in losses from inflation. Motorists also are purchasing less gas because cars are more fuel-efficient, and there are more hybrids and alternative-fuel vehicles.
Utah has projected an $11 billion shortfall for high-priority transportation projects through 2040 unless it reforms gasoline and other transportation taxes. "This is a first step," said Rep. Dan McCay, R-Riverton.
The committee also unanimously passed HB152, by Rep. John Knotwell, R-Herriman. It would allow UDOT to sell banner ads for its online traffic application and sell limited ads at rest stops.
"This is an opportunity to stretch finite dollars we have in transportation for maintenance," Knotwell said. "It will not raise taxes" but help fund roads.
The bill would ban political ads and any activity that is illegal for minors, such as use of tobacco and alcohol or gambling.