Gas prices are having the most expensive start to the year since 2014, AAA said. The average price of a gallon of regular-grade gasoline jumped 4 cents nationally over the past two weeks to $2.58.

NewMax reported that industry analyst Trilby Lundberg of the Lundberg Survey said that the increase is due to higher crude oil costs. The current gas price is 22 cents above where it was a year ago.

Gas in San Francisco was the highest in the contiguous United States at an average of $3.26 a gallon. The lowest was in Tucson, Arizona, at $2.16 a gallon.

The U.S. average diesel price is $2.99, up 5 cents from two weeks ago.

“It has been anything but a normal January for prices at the pump,” said Mark Jenkins, spokesman, AAA – The Auto Club Group. “Normally, demand slips and supplies build. However, this story so far this year has been a rally in oil prices.

“Oil prices strung together three weeks of significant gains, raising the cost of producing gasoline,” Jenkins continued.

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