Massachusetts is heading into the heart of summer with gas prices that are pushing $3 a gallon.

Prices ticked up another 3 cents in AAA Northeast's weekly price survey, the automobile organization announced Monday. At $2.98, the average price for a gallon of gas in Massachusetts is up 88 cents compared to this time a year ago.

AAA Northeast Director of Public Affairs Mary Maguire said 89 percent of U.S. gas stations are selling regular unleaded for $2.75 a gallon or more.

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"Road trippers will pay the most to fill up for the holiday since 2014," Maguire said.

AAA said crude oil is more expensive this year due to three factors: confidence in the worldwide COVID-19 vaccination rollout, global oil demand spikes, and the easing of travel restrictions leading to optimism for leisure travel. Gas price increases appear likely to continue during the summer.