TRENTON, N.J. (CBS/AP) — Motorists traveling this Memorial Day weekend will find gas prices that have risen for the first time in weeks.

AAA Mid-Atlantic says rising demand and crude oil prices likely are pushing prices higher.

Pennsylvania’s average this week is $2.58 per gallon of regular unleaded gasoline. That’s up just 1 cent from a week ago, but up 11 cents from the same time last year.

In New Jersey, the average this week is $2.40, up 4 cents from a week ago and up 26 cents from a year ago.

READ: Thousands Flock To Jersey Shore For Memorial Day Weekend

New Jersey’s average reflects a 23-cent hike in the state gas tax last fall.

Nationally, a gallon of regular unleaded is $2.37, up 2 cents from a week ago and 6 cents higher than a year ago.

AAA Mid-Atlantic estimates close to 35 million Americans will hit the road this weekend, 2.4 percent more than last year and the highest number in 12 years.

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